{"id":4175,"date":"2017-12-12T07:00:40","date_gmt":"2017-12-12T15:00:40","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=4175"},"modified":"2025-06-13T18:45:53","modified_gmt":"2025-06-14T01:45:53","slug":"full-stack-node-js-vue-js-couchbase-nosql","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/pt\/full-stack-node-js-vue-js-couchbase-nosql\/","title":{"rendered":"Indo para a pilha completa com Node.js, Vue.js e Couchbase NoSQL"},"content":{"rendered":"<p>Se voc\u00ea est\u00e1 acompanhando, sou um grande defensor do desenvolvimento do Node.js e da pilha de desenvolvimento JavaScript. Anteriormente, escrevi sobre o <a href=\"https:\/\/www.thepolyglotdeveloper.com\/2015\/10\/create-a-full-stack-app-using-node-js-couchbase-server\/\" target=\"_blank\" rel=\"noopener\">Pilha Couchbase, Express, AngularJS e Node.js (CEAN)<\/a> e <a href=\"https:\/\/www.couchbase.com\/blog\/pt\/create-restful-api-node-js-hapi-couchbase-nosql\/\" target=\"_blank\" rel=\"noopener\">modernizamos a API de back-end com o Hapi.js<\/a>uma alternativa popular ao Express. Sou um grande f\u00e3 do Angular, mas recentemente tenho explorado a cada vez mais popular estrutura Vue.js.<\/p>\n<p>Veremos como criar um aplicativo de pilha completa usando a pilha JavaScript que consiste em Node.js, Hapi, Vue.js e <a href=\"https:\/\/www.couchbase.com\/blog\/pt\/\" target=\"_blank\" rel=\"noopener\">Couchbase<\/a> NoSQL. Como todos os caracteres iniciais das tecnologias s\u00e3o consoantes, n\u00e3o tentarei criar um acr\u00f4nimo para elas.<\/p>\n<p><!--more--><\/p>\n<p>O aplicativo que criamos ter\u00e1 um modelo de dados semi-simplista. Armazenaremos informa\u00e7\u00f5es sobre pessoas e endere\u00e7os e configuraremos como os endere\u00e7os est\u00e3o relacionados a determinadas pessoas.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4177 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2017\/11\/couchbase-vuejs-hapijs-nodejs.png\" alt=\"Hapi.js and Vue.js with Couchbase Project\" width=\"1100\" height=\"515\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/11\/couchbase-vuejs-hapijs-nodejs.png 1100w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/11\/couchbase-vuejs-hapijs-nodejs-300x140.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/11\/couchbase-vuejs-hapijs-nodejs-1024x479.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/11\/couchbase-vuejs-hapijs-nodejs-768x360.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/11\/couchbase-vuejs-hapijs-nodejs-20x9.png 20w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><\/p>\n<p>O backend do Node.js com Hapi demonstrar\u00e1 o uso de N1QL e muta\u00e7\u00f5es de subdocumentos no banco de dados. O <a href=\"https:\/\/vuejs.org\/\" target=\"_blank\" rel=\"noopener\">Vue.js<\/a> nos dar\u00e1 uma sa\u00edda semi-atrativa para trabalhar com nossa API.<\/p>\n<h2>Configura\u00e7\u00e3o do Couchbase para consulta e controle de acesso com base em fun\u00e7\u00e3o<\/h2>\n<p>Antes de come\u00e7armos a desenvolver nossa API RESTful que se comunica com o banco de dados NoSQL do Couchbase, o banco de dados deve ser configurado corretamente. Vamos supor que voc\u00ea j\u00e1 tenha instalado o <a href=\"https:\/\/www.couchbase.com\/blog\/pt\/downloads\/\" target=\"_blank\" rel=\"noopener\">Servidor Couchbase 5<\/a> ou superior.<\/p>\n<p>Com o Couchbase pronto para funcionar, precisamos criar um Bucket para armazenar nossos dados. Este tutorial far\u00e1 refer\u00eancia a um Bucket chamado\u00a0<strong>exemplo<\/strong>mas isso realmente n\u00e3o importa, desde que voc\u00ea seja consistente.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4316 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2017\/12\/couchbase-bucket-example-full-stack.png\" alt=\"Couchbase Example Bucket\" width=\"1100\" height=\"361\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-bucket-example-full-stack.png 1100w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-bucket-example-full-stack-300x98.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-bucket-example-full-stack-1024x336.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-bucket-example-full-stack-768x252.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-bucket-example-full-stack-20x7.png 20w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><\/p>\n<p>O Bucket n\u00e3o precisa de nenhuma configura\u00e7\u00e3o especial para este exemplo.<\/p>\n<p>Com o Bucket dispon\u00edvel, precisamos criar um usu\u00e1rio com permiss\u00e3o para trabalhar com o Bucket. Para obter informa\u00e7\u00f5es sobre a cria\u00e7\u00e3o de controle de acesso baseado em fun\u00e7\u00e3o (RBAC), consulte um artigo anterior que escrevi intitulado,\u00a0<a href=\"https:\/\/www.couchbase.com\/blog\/pt\/secure-nosql-data-couchbase-role-based-access-control\/\" target=\"_blank\" rel=\"noopener\">Proteja seus dados NoSQL com o controle de acesso baseado em fun\u00e7\u00e3o do Couchbase<\/a>. A conta precisar\u00e1 de <strong>Leitor de dados<\/strong>, <strong>Gravador de dados<\/strong>e <strong>Sele\u00e7\u00e3o de consulta<\/strong> fun\u00e7\u00f5es. Isso nos permitir\u00e1 realizar opera\u00e7\u00f5es CRUD no banco de dados, bem como executar consultas N1QL.<\/p>\n<p>Por fim, precisamos preparar um \u00edndice para suporte a consultas N1QL.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4317 size-full\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2017\/12\/couchbase-n1ql-primary-index.png\" alt=\"Couchbase N1QL Primary Index\" width=\"1100\" height=\"343\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-n1ql-primary-index.png 1100w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-n1ql-primary-index-300x94.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-n1ql-primary-index-1024x319.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-n1ql-primary-index-768x239.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2017\/12\/couchbase-n1ql-primary-index-20x6.png 20w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><\/p>\n<p>Em um ambiente de produ\u00e7\u00e3o, voc\u00ea dever\u00e1 criar um \u00edndice para cada consulta que deseja executar. Para o nosso exemplo, usaremos um \u00edndice prim\u00e1rio que \u00e9 um \u00edndice de prototipagem.<\/p>\n<p>Execute a seguinte consulta para criar o \u00edndice:<\/p>\n<pre class=\"lang:default decode:true\">CREATE PRIMARY INDEX ON `example`;<\/pre>\n<p>O \u00edndice prim\u00e1rio nos proporcionar\u00e1 a conveni\u00eancia de poder executar qualquer consulta em nosso Bucket, mas com o custo do desempenho. Os \u00edndices personalizados proporcionar\u00e3o um desempenho muito melhor.<\/p>\n<p>Nesse momento, podemos iniciar o desenvolvimento.<\/p>\n<h2>Desenvolvimento de um back-end da Web com o Node.js e a estrutura Hapi<\/h2>\n<p>Com o Couchbase pronto para uso, podemos come\u00e7ar a desenvolver o aplicativo Node.js com Hapi. Se voc\u00ea j\u00e1 viu meu <a href=\"https:\/\/www.couchbase.com\/blog\/pt\/create-restful-api-node-js-hapi-couchbase-nosql\/\" target=\"_blank\" rel=\"noopener\">Artigo anterior<\/a>No caso do Node js e do Couchbase, grande parte do material ser\u00e1 mantido. No entanto, este exemplo ser\u00e1 um pouco mais completo em rela\u00e7\u00e3o ao que o Node.js e o Couchbase podem fazer.<\/p>\n<p>Supondo que voc\u00ea tenha o Node.js instalado, precisamos criar um novo projeto. Na CLI, execute o seguinte:<\/p>\n<pre class=\"lang:default decode:true\">npm init -y\r\nnpm install hapi joi couchbase uuid --save<\/pre>\n<p>Os comandos acima inicializar\u00e3o um novo projeto e instalar\u00e3o o <code>hapi<\/code> para o Hapi.js, o pacote <code>joi<\/code> para valida\u00e7\u00e3o de dados, o pacote <code>couchbase<\/code> para intera\u00e7\u00e3o com o Couchbase, e o pacote <code>uuid<\/code> para gerar cadeias de caracteres exclusivas.<\/p>\n<p>Em seguida, crie um\u00a0<strong>app.js<\/strong> que conter\u00e1 todo o nosso c\u00f3digo Node.js. Para come\u00e7ar, adicione o seguinte ao arquivo\u00a0<strong>app.js<\/strong> file:<\/p>\n<pre class=\"lang:default decode:true\">const Couchbase = require(\"couchbase\");\r\nconst Hapi = require(\"hapi\");\r\nconst Joi = require(\"joi\");\r\nconst UUID = require(\"uuid\");\r\n\r\nconst server = new Hapi.Server();\r\nconst cluster = novo Couchbase.Cluster(\"couchbase:\/\/localhost\");\r\ncluster.authenticate(\"demo\", \"123456\");\r\nconst bucket = cluster.openBucket(\"example\");\r\n\r\nserver.connection({ host: \"localhost\", port: 3000, routes: { cors: true } });\r\n\r\nbucket.on(\"error\", error =&gt; {\r\n    throw error;\r\n});\r\n\r\nserver.start(error =&gt; {\r\n    if(error) {\r\n        throw error;\r\n    }\r\n    console.log(\"Listening at \" + server.info.uri);\r\n});<\/pre>\n<p>O c\u00f3digo acima importar\u00e1 nossas depend\u00eancias, se conectar\u00e1 \u00e0 nossa inst\u00e2ncia do Couchbase usando as informa\u00e7\u00f5es que especificamos na etapa anterior e configurar\u00e1 nosso servidor Hapi para operar em https:\/\/localhost:3000.<\/p>\n<p>Ao definir nossas informa\u00e7\u00f5es de conex\u00e3o, optamos por ativar o compartilhamento de recursos entre origens (CORS). Isso permitir\u00e1 que nosso aplicativo Vue.js se comunique com o aplicativo Node.js, mesmo que eles estejam operando em portas diferentes. Mais informa\u00e7\u00f5es sobre CORS com o Hapi podem ser encontradas em um <a href=\"https:\/\/www.thepolyglotdeveloper.com\/2017\/11\/cross-origin-resource-sharing-node-hapi-application\/\" target=\"_blank\" rel=\"noopener\">Artigo anterior<\/a> que eu escrevi.<\/p>\n<p>Neste ponto, podemos come\u00e7ar a definir as rotas de endpoint para nossa API.<\/p>\n<p>O objetivo \u00e9 criar dados para pessoas e endere\u00e7os no Couchbase. Como atualmente n\u00e3o existem dados para essas duas categorias, faz sentido come\u00e7ar com endpoints que executam a cria\u00e7\u00e3o de dados.<\/p>\n<pre class=\"lang:default decode:true\">server.route({\r\n    method: \"POST\",\r\n    path: \"\/person\",\r\n    config: {\r\n        validate: {\r\n            payload: {\r\n                firstname: Joi.string().required(),\r\n                lastname: Joi.string().required(),\r\n                type: Joi.string().forbidden().default(\"person\"),\r\n                timestamp (registro de data e hora): Joi.any().forbidden().default((new Date).getTime())\r\n            }\r\n        }\r\n    },\r\n    handler: (request, response) =&gt; {\r\n        var id = UUID.v4();\r\n        bucket.insert(id, request.payload, (error, result) =&gt; {\r\n            if(error) {\r\n                return response({ code: error.code, message: error.message }).code(500);\r\n            }\r\n            request.payload.id = id;\r\n            response(request.payload);\r\n        });\r\n    }\r\n});<\/pre>\n<p>O c\u00f3digo acima criar\u00e1 um endpoint que aceita solicita\u00e7\u00f5es POST. Supondo que a carga \u00fatil de JSON enviada com a solicita\u00e7\u00e3o atenda aos crit\u00e9rios da l\u00f3gica de valida\u00e7\u00e3o, o <code>manipulador<\/code> ser\u00e1 usado. Ser\u00e1 gerada uma identifica\u00e7\u00e3o exclusiva e a carga \u00fatil ser\u00e1 salva com a identifica\u00e7\u00e3o criada. Em caso de sucesso, a carga \u00fatil com o ID ser\u00e1 devolvida ao cliente.<\/p>\n<p>Uma l\u00f3gica semelhante pode ser usada na cria\u00e7\u00e3o de endere\u00e7os:<\/p>\n<pre class=\"lang:default decode:true\">server.route({\r\n    method: \"POST\",\r\n    path: \"\/address\",\r\n    config: {\r\n        validate: {\r\n            payload: {\r\n                city: Joi.string().required(),\r\n                state: Joi.string().required(),\r\n                type: Joi.string().forbidden().default(\"address\"),\r\n                timestamp: Joi.any().forbidden().default((new Date).getTime())\r\n            }\r\n        }\r\n    },\r\n    handler: (request, response) =&gt; {\r\n        var id = UUID.v4();\r\n        bucket.insert(id, request.payload, (error, result) =&gt; {\r\n            if(error) {\r\n                return response({ code: error.code, message: error.message }).code(500);\r\n            }\r\n            request.payload.id = id;\r\n            response(request.payload);\r\n        });\r\n    }\r\n});<\/pre>\n<p>A l\u00f3gica de valida\u00e7\u00e3o dos endere\u00e7os \u00e9 um pouco diferente, mas todo o resto permanece o mesmo. Essa mesma l\u00f3gica pode ser transferida para praticamente qualquer endpoint de cria\u00e7\u00e3o com solicita\u00e7\u00f5es POST.<\/p>\n<p>Com os documentos dispon\u00edveis no Couchbase, podemos tentar consult\u00e1-los. Faz sentido criar uma consulta especializada que encontre <code>pessoa<\/code> documentos ou <code>endere\u00e7o<\/code> documentos. Para fazer isso, usaremos o N1QL.<\/p>\n<pre class=\"lang:default decode:true\">server.route({\r\n    method: \"GET\",\r\n    path: \"\/addresses\",\r\n    handler: (request, response) =&gt; {\r\n        var statement = \"SELECT META(address).id, address.* FROM example AS address WHERE address.type = 'address'\";\r\n        var query = Couchbase.N1qlQuery.fromString(statement);\r\n        bucket.query(query, (error, result) =&gt; {\r\n            if(error) {\r\n                return response({ code: error.code, message: error.message }).code(500);\r\n            }\r\n            response(result);\r\n        });\r\n    }\r\n});<\/pre>\n<p>A rota acima usar\u00e1 uma consulta N1QL que obt\u00e9m todos os documentos e suas chaves de documento, desde que contenham uma propriedade chamada <code>tipo<\/code> que \u00e9 igual a <code>endere\u00e7o<\/code>.<\/p>\n<p>Da mesma forma, poder\u00edamos fazer a mesma coisa para <code>pessoa<\/code> documentos:<\/p>\n<pre class=\"lang:default decode:true\">server.route({\r\n    method: \"GET\",\r\n    path: \"\/people\",\r\n    handler: (request, response) =&gt; {\r\n        var statement = \"SELECT META(person).id, person.* FROM example AS person WHERE person.type = 'person'\";\r\n        var query = Couchbase.N1qlQuery.fromString(statement);\r\n        bucket.query(query, (error, result) =&gt; {\r\n            if(error) {\r\n                return response({ code: error.code, message: error.message }).code(500);\r\n            }\r\n            response(result);\r\n        });\r\n    }\r\n});<\/pre>\n<p>No entanto, isso \u00e9 enfadonho, apenas consultar documentos com base em suas <code>tipo<\/code> propriedade. Provavelmente, devemos estabelecer uma rela\u00e7\u00e3o entre os dois tipos.<\/p>\n<p>A ideia aqui \u00e9 criar uma matriz dentro do <code>pessoa<\/code> documentos que cont\u00eam um ID para cada endere\u00e7o ao qual est\u00e3o associados. Em vez de obter um documento inteiro, criar ou atualizar a matriz e salvar novamente, faremos uma muta\u00e7\u00e3o de subdocumento diretamente no banco de dados.<\/p>\n<p>Veja o seguinte endpoint, por exemplo:<\/p>\n<pre class=\"lang:default decode:true\">server.route({\r\n    method: \"PUT\",\r\n    path: \"\/person\/address\/{personid}\",\r\n    config: {\r\n        validate: {\r\n            payload: {\r\n                addressid: Joi.string().required()\r\n            }\r\n        }\r\n    },\r\n    handler: (request, response) =&gt; {\r\n        bucket.mutateIn(request.params.personid).arrayAppend(\"addresses\", request.payload.addressid, true).execute((error, result) =&gt; {\r\n            if(error) {\r\n                return response({ code: error.code, message: error.message }).code(500);\r\n            }\r\n            bucket.get(request.params.personid, (error, result) =&gt; {\r\n                if(error) {\r\n                    return response({ code: error.code, message: error.message }).code(500);\r\n                }\r\n                response(result.value);\r\n            });\r\n        });\r\n    }\r\n});<\/pre>\n<p>O ponto de extremidade acima espera que haja um par\u00e2metro de rota e uma carga \u00fatil em cada solicita\u00e7\u00e3o. O par\u00e2metro de rota \u00e9 o ID de um <code>pessoa<\/code> e o payload conter\u00e1 um id de um documento <code>endere\u00e7o<\/code> documento.<\/p>\n<p>Ao usar o <code>mutateIn<\/code> podemos fornecer um documento a ser alterado e um caminho para a propriedade que deve ser alterada. Nesse caso, o <code>pessoa<\/code> ser\u00e1 alterado, e estaremos adicionando valores a um documento <code>endere\u00e7os<\/code> dentro dele. Se o <code>endere\u00e7os<\/code> n\u00e3o existe, n\u00e3o se preocupe, ela ser\u00e1 criada.<\/p>\n<p>Depois que a muta\u00e7\u00e3o ocorrer, vamos extrair todo o documento que sofreu muta\u00e7\u00e3o e devolv\u00ea-lo ao cliente.<\/p>\n<p>Agora podemos fazer uma consulta N1QL mais interessante em nossos dados. Confira este endpoint revisado para coletar <code>pessoa<\/code> documentos:<\/p>\n<pre class=\"lang:default decode:true\">server.route({\r\n    method: \"GET\",\r\n    path: \"\/people\",\r\n    handler: (request, response) =&gt; {\r\n        var statement = \"SELECT META(person).id, person.firstname, person.lastname, (SELECT address.city, address.state FROM example AS address USE KEYS person.addresses) AS addresses FROM example AS person WHERE person.type = 'person'\";\r\n        var query = Couchbase.N1qlQuery.fromString(statement);\r\n        bucket.query(query, (error, result) =&gt; {\r\n            if(error) {\r\n                return response({ code: error.code, message: error.message }).code(500);\r\n            }\r\n            response(result);\r\n        });\r\n    }\r\n});<\/pre>\n<p>Agora estamos fazendo uma subconsulta. N\u00e3o estamos fazendo apenas uma consulta simples porque uma matriz de valores de identifica\u00e7\u00e3o de endere\u00e7o n\u00e3o \u00e9 muito \u00fatil para n\u00f3s. Em vez disso, a subconsulta carrega esses valores de id para que nossos resultados tenham endere\u00e7os reais neles.<\/p>\n<p>Legal, n\u00e3o \u00e9?<\/p>\n<p>Vamos concluir nossa API RESTful com um \u00faltimo endpoint.<\/p>\n<pre class=\"lang:default decode:true\">server.route({\r\n    method: \"GET\",\r\n    path: \"\/address\/{addressid}\",\r\n    handler: (request, response) =&gt; {\r\n        bucket.get(request.params.addressid, (error, result) =&gt; {\r\n            if(error) {\r\n                return response({ code: error.code, message: error.message }).code(500);\r\n            }\r\n            response(result.value);\r\n        });\r\n    }\r\n});<\/pre>\n<p>O ponto de extremidade acima nos permitir\u00e1 retornar um \u00fanico endere\u00e7o espec\u00edfico com base em sua chave de documento.<\/p>\n<p>Com a API criada, voc\u00ea poderia test\u00e1-la facilmente com o Postman ou uma ferramenta semelhante. No entanto, vamos criar um frontend para ela com o Vue.js.<\/p>\n<h2>Cria\u00e7\u00e3o de um front-end de cliente com o Vue.js<\/h2>\n<p>A ideia por tr\u00e1s do frontend \u00e9 que estaremos fazendo solicita\u00e7\u00f5es HTTP para o backend que acabamos de criar. A maior parte do nosso trabalho ser\u00e1 nas solicita\u00e7\u00f5es, na vincula\u00e7\u00e3o de dados e na atratividade geral da nossa interface do usu\u00e1rio.<\/p>\n<p>Se voc\u00ea for novo no Vue.js, certifique-se de obter a CLI do Vue. Em um novo diret\u00f3rio, execute o seguinte com a CLI do Vue:<\/p>\n<pre class=\"lang:default decode:true\">vue init front-end do webpack<\/pre>\n<p>O comando acima iniciar\u00e1 o processo de scaffolding para o Vue.js. Selecione\u00a0<strong>n\u00e3o<\/strong> para tudo o que for solicitado, pois n\u00e3o usaremos todos esses recursos. Quando se trata de um projeto aut\u00f4nomo (compilador e tempo de execu\u00e7\u00e3o) versus somente tempo de execu\u00e7\u00e3o, isso n\u00e3o importa para este exemplo.<\/p>\n<p>Quando o andaime estiver pronto, execute os seguintes comandos:<\/p>\n<pre class=\"lang:default decode:true\">cd frontend\r\nnpm install<\/pre>\n<p>Os comandos acima far\u00e3o o download de todas as depend\u00eancias necess\u00e1rias para o projeto b\u00e1sico. No entanto, precisamos de uma depend\u00eancia para fazer solicita\u00e7\u00f5es HTTP com o Vue.js. Execute o seguinte na CLI:<\/p>\n<pre class=\"lang:default decode:true\">npm install axios --save<\/pre>\n<p>Este projeto usar\u00e1 o <a href=\"https:\/\/github.com\/axios\/axios\" target=\"_blank\" rel=\"noopener\">\u00e1xis<\/a> pacote. Para obter mais informa\u00e7\u00f5es sobre o axios e fazer solicita\u00e7\u00f5es HTTP com o Vue.js, confira um tutorial anterior que escrevi intitulado,\u00a0<a href=\"https:\/\/www.thepolyglotdeveloper.com\/2017\/10\/consume-api-data-http-vuejs-web-application\/\" target=\"_blank\" rel=\"noopener\">Consumir dados de API remota via HTTP em um aplicativo da Web Vue.js<\/a>.<\/p>\n<p>Em seu projeto, voc\u00ea deve ter um <strong>src\/App.vue<\/strong> arquivo. Para simplificar, este ser\u00e1 um aplicativo de p\u00e1gina \u00fanica e arquivo \u00fanico. Ignore quaisquer outros componentes que tenham sido criados com o scaffold.<\/p>\n<p>Antes de come\u00e7armos a adicionar a marca\u00e7\u00e3o HTML e a l\u00f3gica JavaScript, vamos incluir <a href=\"https:\/\/getbootstrap.com\/docs\/3.3\/\" target=\"_blank\" rel=\"noopener\">Bootstrap<\/a> como nossa estrutura de temas. Abra a se\u00e7\u00e3o\u00a0<strong>index.html<\/strong> e fa\u00e7a com que ele se pare\u00e7a com o seguinte:<\/p>\n<pre class=\"lang:default decode:true\">&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n    &lt;head&gt;\r\n        &lt;meta charset=&quot;utf-8&quot;&gt;\r\n        &lt;title&gt;vue-project&lt;\/title&gt;\r\n        &lt;link rel=&quot;stylesheet&quot; href=&quot;https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/3.3.7\/css\/bootstrap.min.css&quot; \/&gt;\r\n    &lt;\/head&gt;\r\n    &lt;body&gt;\r\n        &lt;div id=&quot;app&quot;&gt;&lt;\/div&gt;\r\n        &lt;!-- built files will be auto injected --&gt;\r\n        &lt;script src=&quot;https:\/\/code.jquery.com\/jquery-3.2.1.min.js&quot;&gt;&lt;\/script&gt;\r\n        &lt;script src=&quot;https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/3.3.7\/js\/bootstrap.min.js&quot;&gt;&lt;\/script&gt;\r\n    &lt;\/body&gt;\r\n&lt;\/html&gt;<\/pre>\n<p>A maior parte das informa\u00e7\u00f5es acima foi extra\u00edda do <a href=\"https:\/\/getbootstrap.com\/docs\/3.3\/getting-started\/\" target=\"_blank\" rel=\"noopener\">Documenta\u00e7\u00e3o de introdu\u00e7\u00e3o ao Bootstrap<\/a>. Agora, quando come\u00e7armos a codificar no\u00a0<strong>src\/App.vue<\/strong> arquivo, ele parecer\u00e1 um pouco mais atraente.<\/p>\n<p>Como na maioria dos arquivos de projeto do Vue, h\u00e1 um <code>&lt;template&gt;<\/code>, <code>&lt;script&gt;<\/code>e <code>&lt;style&gt;<\/code> bloco. Nosso <code>&lt;style&gt;<\/code> n\u00e3o ter\u00e1 nada de especial adicionado, portanto, abra o bloco\u00a0<strong>src\/App.vue<\/strong> e inclua o seguinte:<\/p>\n<pre class=\"lang:default decode:true\">#app {\r\n        font-family: 'Avenir', Helvetica, Arial, sans-serif;\r\n        -webkit-font-smoothing: antialiased;\r\n        -moz-osx-font-smoothing: grayscale;\r\n        cor: #2c3e50;\r\n        margin-top: 30px;\r\n    }<\/pre>\n<p>A maior parte do nosso trabalho estar\u00e1 nos outros dois blocos de c\u00f3digo. Para simplificar, come\u00e7aremos com a l\u00f3gica e depois terminaremos com a interface do usu\u00e1rio.<\/p>\n<p>No \u00e2mbito do projeto\u00a0<strong>src\/App.vue<\/strong> inclua o seguinte c\u00f3digo JavaScript:<\/p>\n<pre class=\"lang:default decode:true\">&lt;script&gt;\r\n    import axios from \"axios\";\r\n    export default {\r\n        name: 'app',\r\n        data() {\r\n            return {\r\n                input: {\r\n                    person: {\r\n                        firstname: \"\",\r\n                        lastname: \"\"\r\n                    },\r\n                    address: {\r\n                        city: \"\",\r\n                        state: \"\"\r\n                    },\r\n                    addressid: \"\"\r\n                },\r\n                people: [],\r\n                addresses: []\r\n            }\r\n        },\r\n        mounted() {\r\n            axios({ method: \"GET\", url: \"https:\/\/localhost:3000\/people\" }).then(result =&gt; {\r\n                this.people = result.data;\r\n            });\r\n            axios({ method: \"GET\", url: \"https:\/\/localhost:3000\/addresses\" }).then(result =&gt; {\r\n                this.addresses = result.data;\r\n            });\r\n        },\r\n        methods: {\r\n            createPerson() {\r\n                if(this.input.person.firstname != \"\" &amp;&amp; this.input.person.lastname != \"\") {\r\n                    axios({ method: \"POST\", url: \"https:\/\/localhost:3000\/person\", data: this.input.person, headers: { \"content-type\": \"application\/json\" }}).then(result =&gt; {\r\n                        this.people.push(result.data);\r\n                        this.input.person.firstname = \"\";\r\n                        this.input.person.lastname = \"\";\r\n                    });\r\n                }\r\n            },\r\n            createAddress() {\r\n                if(this.input.address.city != \"\" &amp;&amp; this.input.address.state != \"\") {\r\n                    axios({ method: \"POST\", url: \"https:\/\/localhost:3000\/address\", data: this.input.address, headers: { \"content-type\": \"application\/json\" }}).then(result =&gt; {\r\n                        this.addresses.push(result.data);\r\n                        this.input.address.city = \"\";\r\n                        this.input.address.state = \"\";\r\n                    });\r\n                }\r\n            },\r\n            linkAddress(personid) {\r\n                if(this.input.addressid != undefined &amp;&amp; personid != \"\") {\r\n                    axios({ method: \"PUT\", url: \"https:\/\/localhost:3000\/person\/address\/\" + personid, data: { addressid: this.input.addressid }, headers: { \"content-type\": \"application\/json\" }}).then(result =&gt; {\r\n                        for(let i = 0; i &lt; this.people.length; i++) {\r\n                            if(this.people[i].id == personid) {\r\n                                if(this.people[i].addresses == undefined) {\r\n                                    this.people[i].addresses = [];\r\n                                }\r\n                                axios({ method: \"GET\", url: \"https:\/\/localhost:3000\/address\/\" + this.input.addressid }).then(result =&gt; {\r\n                                    this.people[i].addresses.push(result.data);\r\n                                    this.input.addressid = \"\";\r\n                                });\r\n                            }\r\n                        }\r\n                    });\r\n                }\r\n            }\r\n        }\r\n    }\r\n&lt;\/script&gt;<\/pre>\n<p>H\u00e1 muita coisa acontecendo no texto acima, portanto, vamos detalh\u00e1-lo.<\/p>\n<p>A primeira parte central da l\u00f3gica que adicionamos est\u00e1 relacionada \u00e0 inicializa\u00e7\u00e3o de dados. A <code>dados<\/code> nos permitir\u00e1 inicializar as vari\u00e1veis usadas em todo esse arquivo espec\u00edfico.<\/p>\n<pre class=\"lang:default decode:true\">data() {\r\n    return {\r\n        input: {\r\n            person: {\r\n                firstname: \"\",\r\n                lastname: \"\"\r\n            },\r\n            address: {\r\n                city: \"\",\r\n                state: \"\"\r\n            },\r\n            addressid: \"\"\r\n        },\r\n        pessoas: [],\r\n        addresses: []\r\n    }\r\n},<\/pre>\n<p>No <code>dados<\/code> m\u00e9todo, o <code>entrada<\/code> ser\u00e1 vinculado a um formul\u00e1rio na interface do usu\u00e1rio. No nosso caso, teremos dois formul\u00e1rios, um para <code>pessoa<\/code> e um para <code>endere\u00e7o<\/code>. Por padr\u00e3o, queremos que os valores fiquem em branco. Tamb\u00e9m estamos inicializando nossa lista de <code>pessoas<\/code> e nossa lista de <code>endere\u00e7os<\/code> que ser\u00e1 obtido da API do Node.js.<\/p>\n<p>Ap\u00f3s a inicializa\u00e7\u00e3o das vari\u00e1veis, precisamos carregar alguns dados do servidor. Isso pode ser feito na se\u00e7\u00e3o <code>montado<\/code> m\u00e9todo.<\/p>\n<pre class=\"lang:default decode:true\">mounted() {\r\n    axios({ method: \"GET\", url: \"https:\/\/localhost:3000\/people\" }).then(result =&gt; {\r\n        this.people = result.data;\r\n    });\r\n    axios({ method: \"GET\", url: \"https:\/\/localhost:3000\/addresses\" }).then(result =&gt; {\r\n        this.addresses = result.data;\r\n    });\r\n},<\/pre>\n<p>Quando o aplicativo \u00e9 carregado, \u00e9 feita uma solicita\u00e7\u00e3o de pessoas e uma solicita\u00e7\u00e3o de endere\u00e7os.<\/p>\n<p>Isso nos leva \u00e0 lista de m\u00e9todos que podem ser chamados a partir do HTML. O m\u00e9todo <code>createPerson<\/code> pegar\u00e1 os dados do formul\u00e1rio da pessoa e os enviar\u00e1 \u00e0 API para serem salvos. Da mesma forma, o m\u00e9todo <code>createAddress<\/code> far\u00e1 o mesmo, mas com informa\u00e7\u00f5es de endere\u00e7o.<\/p>\n<p>O <code>linkAddress<\/code> \u00e9 um pouco diferente:<\/p>\n<pre class=\"lang:default decode:true\">linkAddress(personid) {\r\n    if(this.input.addressid != undefined &amp;&amp; personid != \"\") {\r\n        axios({ method: \"PUT\", url: \"https:\/\/localhost:3000\/person\/address\/\" + personid, data: { addressid: this.input.addressid }, headers: { \"content-type\": \"application\/json\" }}).then(result =&gt; {\r\n            for(let i = 0; i  {\r\n                        this.people[i].addresses.push(result.data);\r\n                        this.input.addressid = \"\";\r\n                    });\r\n                }\r\n            }\r\n        });\r\n    }\r\n}<\/pre>\n<p>O <code>linkAddress<\/code> pegar\u00e1 um determinado ID de pessoa e um determinado ID de endere\u00e7o e os enviar\u00e1 ao nosso endpoint da API de subdocumento. Quando terminar, ele atualizar\u00e1 as informa\u00e7\u00f5es nas vari\u00e1veis locais para exibi\u00e7\u00e3o na interface do usu\u00e1rio.<\/p>\n<p>Isso nos leva \u00e0 parte HTML do nosso arquivo de aplicativo. Dentro da se\u00e7\u00e3o <code>&lt;template&gt;<\/code> bloco, dever\u00edamos ter algo como o seguinte:<\/p>\n<pre class=\"lang:default decode:true\">&lt;template&gt;\r\n    &lt;div id=&quot;app&quot;&gt;\r\n        &lt;div class=&quot;container&quot;&gt;\r\n            &lt;div class=&quot;row&quot;&gt;\r\n                &lt;div class=&quot;col-md-6&quot;&gt;\r\n                    &lt;div class=&quot;well&quot;&gt;\r\n                        &lt;form action=&quot;&quot;&gt;\r\n                            &lt;div class=&quot;form-group&quot;&gt;\r\n                                &lt;label for=&quot;firstname&quot;&gt;Primeiro nome&lt;\/label&gt;\r\n                                &lt;input type=&quot;text&quot; v-model=&quot;input.person.firstname&quot; class=&quot;form-control&quot; id=&quot;firstname&quot; placeholder=&quot;Primeiro nome&quot;&gt;\r\n                            &lt;\/div&gt;\r\n                            &lt;div class=&quot;form-group&quot;&gt;\r\n                                &lt;label for=&quot;lastname&quot;&gt;Sobrenome&lt;\/label&gt;\r\n                                &lt;input type=&quot;text&quot; v-model=&quot;input.person.lastname&quot; class=&quot;form-control&quot; id=&quot;lastname&quot; placeholder=&quot;Sobrenome&quot;&gt;\r\n                            &lt;\/div&gt;\r\n                            &lt;button type=&quot;button&quot; v-on:click=&quot;createPerson()&quot; class=&quot;btn btn-default&quot;&gt;Salvar&lt;\/button&gt;\r\n                        &lt;input type=&quot;hidden&quot; name=&quot;trp-form-language&quot; value=&quot;pt&quot;\/&gt;&lt;\/form&gt;\r\n                    &lt;\/div&gt;\r\n                &lt;\/div&gt;\r\n                &lt;div class=&quot;col-md-6&quot;&gt;\r\n                    &lt;div class=&quot;well&quot;&gt;\r\n                        &lt;form action=&quot;&quot;&gt;\r\n                            &lt;div class=&quot;form-group&quot;&gt;\r\n                                &lt;label for=&quot;city&quot;&gt;Cidade&lt;\/label&gt;\r\n                                &lt;input type=&quot;text&quot; v-model=&quot;input.address.city&quot; class=&quot;form-control&quot; id=&quot;city&quot; placeholder=&quot;Cidade&quot;&gt;\r\n                            &lt;\/div&gt;\r\n                            &lt;div class=&quot;form-group&quot;&gt;\r\n                                &lt;label for=&quot;state&quot;&gt;Estado&lt;\/label&gt;\r\n                                &lt;input type=&quot;text&quot; v-model=&quot;input.address.state&quot; class=&quot;form-control&quot; id=&quot;state&quot; placeholder=&quot;Estado&quot;&gt;\r\n                            &lt;\/div&gt;\r\n                            &lt;button type=&quot;button&quot; v-on:click=&quot;createAddress()&quot; class=&quot;btn btn-default&quot;&gt;Salvar&lt;\/button&gt;\r\n                        &lt;input type=&quot;hidden&quot; name=&quot;trp-form-language&quot; value=&quot;pt&quot;\/&gt;&lt;\/form&gt;\r\n                    &lt;\/div&gt;\r\n                &lt;\/div&gt;\r\n            &lt;\/div&gt;\r\n            &lt;div class=&quot;row&quot;&gt;\r\n                &lt;div class=&quot;col-md-12&quot;&gt;\r\n                    &lt;ul class=&quot;list-group&quot;&gt;\r\n                        &lt;li v-for=&quot;(person, index) in people&quot; class=&quot;list-group-item&quot;&gt;\r\n                            {{ person.firstname }} {{ person.lastname }} -\r\n                            &lt;span v-for=&quot;(address, index) in person.addresses&quot;&gt;\r\n                                {{ address.city }}, {{ address.state }} \/\r\n                            &lt;\/span&gt;\r\n                            &lt;p&gt;\r\n                                &lt;form action=&quot;&quot;&gt;\r\n                                    &lt;div v-for=&quot;(address, index) in addresses&quot;&gt;\r\n                                        &lt;input type=&quot;radio&quot; name=&quot;addressid&quot; v-bind:value=&quot;address.id&quot; v-model=&quot;input.addressid&quot;&gt; {{ address.city }}, {{ address.state }}\r\n                                    &lt;\/div&gt;\r\n                                    &lt;button type=&quot;button&quot; v-on:click=&quot;linkAddress(person.id)&quot; class=&quot;btn btn-default&quot;&gt;Salvar&lt;\/button&gt;\r\n                                &lt;input type=&quot;hidden&quot; name=&quot;trp-form-language&quot; value=&quot;pt&quot;\/&gt;&lt;\/form&gt;\r\n                            &lt;\/p&gt;\r\n                        &lt;\/li&gt;\r\n                    &lt;\/ul&gt;\r\n                &lt;\/div&gt;\r\n            &lt;\/div&gt;\r\n        &lt;\/div&gt;\r\n    &lt;\/div&gt;\r\n&lt;\/template&gt;<\/pre>\n<p>A maior parte do HTML acima \u00e9 um boilerplate do Bootstrap. Se voc\u00ea j\u00e1 trabalhou com o Bootstrap antes, saber\u00e1 que h\u00e1 muita prepara\u00e7\u00e3o envolvida.<\/p>\n<p>V\u00e1 para a se\u00e7\u00e3o a seguir:<\/p>\n<pre class=\"lang:default decode:true\">&lt;form action=&quot;&quot;&gt;\r\n    &lt;div class=&quot;form-group&quot;&gt;\r\n        &lt;label for=&quot;firstname&quot;&gt;Primeiro nome&lt;\/label&gt;\r\n        &lt;input type=&quot;text&quot; v-model=&quot;input.person.firstname&quot; class=&quot;form-control&quot; id=&quot;firstname&quot; placeholder=&quot;Primeiro nome&quot;&gt;\r\n    &lt;\/div&gt;\r\n    &lt;div class=&quot;form-group&quot;&gt;\r\n        &lt;label for=&quot;lastname&quot;&gt;Sobrenome&lt;\/label&gt;\r\n        &lt;input type=&quot;text&quot; v-model=&quot;input.person.lastname&quot; class=&quot;form-control&quot; id=&quot;lastname&quot; placeholder=&quot;Sobrenome&quot;&gt;\r\n    &lt;\/div&gt;\r\n    &lt;button type=&quot;button&quot; v-on:click=&quot;createPerson()&quot; class=&quot;btn btn-default&quot;&gt;Salvar&lt;\/button&gt;\r\n&lt;input type=&quot;hidden&quot; name=&quot;trp-form-language&quot; value=&quot;pt&quot;\/&gt;&lt;\/form&gt;<\/pre>\n<p>Observe que o <code>entrada<\/code> que hav\u00edamos inicializado, agora est\u00e1 vinculado aos elementos do formul\u00e1rio. Essa \u00e9 uma vincula\u00e7\u00e3o de dados bidirecional.<\/p>\n<p>Quando o bot\u00e3o do formul\u00e1rio \u00e9 pressionado para esse formul\u00e1rio espec\u00edfico, o bot\u00e3o <code>createPerson<\/code> \u00e9 chamado. O outro elemento do formul\u00e1rio se comporta da mesma forma.<\/p>\n<p>Na parte principal da interface do usu\u00e1rio, temos uma lista de dados recuperados do servidor:<\/p>\n<pre class=\"lang:default decode:true\">&lt;ul class=&quot;list-group&quot;&gt;\r\n    &lt;li v-for=&quot;(person, index) in people&quot; class=&quot;list-group-item&quot;&gt;\r\n        {{ person.firstname }} {{ person.lastname }} -\r\n        &lt;span v-for=&quot;(address, index) in person.addresses&quot;&gt;\r\n            {{ address.city }}, {{ address.state }} \/\r\n        &lt;\/span&gt;\r\n        &lt;p&gt;\r\n            &lt;form action=&quot;&quot;&gt;\r\n                &lt;div v-for=&quot;(address, index) in addresses&quot;&gt;\r\n                    &lt;input type=&quot;radio&quot; name=&quot;addressid&quot; v-bind:value=&quot;address.id&quot; v-model=&quot;input.addressid&quot;&gt; {{ address.city }}, {{ address.state }}\r\n                &lt;\/div&gt;\r\n                &lt;button type=&quot;button&quot; v-on:click=&quot;linkAddress(person.id)&quot; class=&quot;btn btn-default&quot;&gt;Salvar&lt;\/button&gt;\r\n            &lt;input type=&quot;hidden&quot; name=&quot;trp-form-language&quot; value=&quot;pt&quot;\/&gt;&lt;\/form&gt;\r\n        &lt;\/p&gt;\r\n    &lt;\/li&gt;\r\n&lt;\/ul&gt;<\/pre>\n<p>Estamos listando as pessoas, as informa\u00e7\u00f5es de endere\u00e7o expandidas de nossa consulta N1QL do lado do servidor e a intera\u00e7\u00e3o do bot\u00e3o de op\u00e7\u00e3o para emitir a solicita\u00e7\u00e3o de subdocumento.<\/p>\n<p>Tudo isso \u00e9 feito facilmente com o Vue.js devido \u00e0 forma como a interface do usu\u00e1rio est\u00e1 vinculada \u00e0 camada l\u00f3gica.<\/p>\n<h2>Conclus\u00e3o<\/h2>\n<p>Voc\u00ea acabou de ver como criar um aplicativo de pilha completa composto estritamente de tecnologias JavaScript. Usamos o Node.js com a estrutura Hapi.js para a camada de backend da API e a estrutura Vue.js para a camada de frontend do navegador da Web. O frontend consome dados do backend e o backend obt\u00e9m seus dados do nosso <a href=\"https:\/\/www.couchbase.com\/blog\/pt\/\" target=\"_blank\" rel=\"noopener\">Couchbase<\/a> Banco de dados NoSQL.<\/p>\n<p>Como tornamos o aplicativo muito modular, cada um dos componentes pode ser trocado por uma tecnologia diferente. Poder\u00edamos trocar o Node.js por Java ou outra coisa e poder\u00edamos trocar o Vue.js por outra coisa, como o Angular. Se quiser ver como usar pilha completa com Golang e Angular, consulte este tutorial que escrevi com o t\u00edtulo,\u00a0<a href=\"https:\/\/www.thepolyglotdeveloper.com\/2017\/02\/build-a-full-stack-movie-database-with-golang-angular-and-nosql\/\" target=\"_blank\" rel=\"noopener\">Crie um banco de dados de filmes em pilha completa com Golang, Angular e NoSQL<\/a>.<\/p>\n<p>Para obter mais informa\u00e7\u00f5es sobre como usar o Couchbase com o Node.js, consulte o <a href=\"https:\/\/www.couchbase.com\/blog\/pt\/developers\/\" target=\"_blank\" rel=\"noopener\">Portal do desenvolvedor do Couchbase<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>If you&#8217;ve been keeping up, I&#8217;m a huge advocate for Node.js development and the JavaScript development stack. Previously I had written about the Couchbase, Express, AngularJS, and Node.js (CEAN) stack and modernized the backend API with Hapi.js, a popular alternative [&hellip;]<\/p>","protected":false},"author":63,"featured_media":13873,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1814,1815,1816,1822],"tags":[1393,1725,1745,2083],"ppma_author":[9032],"class_list":["post-4175","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-design","category-best-practices-and-tutorials","category-couchbase-server","category-node-js","tag-api","tag-nosql-database","tag-restful","tag-vue-js"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.7.1 (Yoast SEO v25.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Going Full Stack with Node.js, Vue.js, and Couchbase 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