无法将数据库与 postgraphile 连接

Question

我在 pgadmin 中有一个名为 "mydatabase" 的数据库，表名为 "mytable"。它在 http://127.0.0.1:33859/browser/ 中运行。我试图使用 postgraphile 来连接它。这是代码

const express = require("express");
const { postgraphile } = require("postgraphile");

const app = express();

app.use(postgraphile("postgres://postgres:postgres@localhost:33859/mydatabase -s public"));

app.listen(3000);

我的超级用户用户名是 "postgres"，密码是 "postgres"。该数据库由名为 "test" 且密码为“1234”的用户所有。运行带node的脚本后，终端没有报错。当我点击端口 3000 时，它显示 Cannot GET /。有什么帮助吗？

Answer 1

因为 PostGraphile 中间件预计会与您的 Node.js 应用程序的其余部分一起安装，它不会接管根 URL 而是使 GraphQL 端点在 /graphql 默认。要更改此设置，有 graphqlRoute 和 graphiqlRoute 选项 documented in the Library Usage page.

这里有一些不错的入门选项：

const isDev = process.env.NODE_ENV !== "production" && process.env.NODE_ENV !== "staging";    
const DB = "postgres://postgres:postgres@localhost:33859/mydatabase -s public";
const SCHEMA = "public";

app.use(postgraphile(DB, SCHEMA, {
  // Enable the GraphiQL IDE in development
  graphiql: isDev,
  // Add some enhancements (headers, formatting, etc)
  enhanceGraphiql: isDev,

  // Makes GraphiQL available at http://localhost:3000/ rather than /graphiql
  graphiqlRoute: '/',

  // Watch DB for changes
  watchPg: isDev,

  // Use JSON objects rather than strings
  dynamicJson: true,

  // Debugging
  showErrorStack: isDev,
  extendedErrors:
    isDev
      ? [
          "errcode",
          "severity",
          "detail",
          "hint",
          "positon",
          "internalPosition",
          "internalQuery",
          "where",
          "schema",
          "table",
          "column",
          "dataType",
          "constraint",
          "file",
          "line",
          "routine",
        ]
      : ["errcode"],

    // For use with e.g. apollo-link-batch-http
    enableQueryBatching: true,

}));

您可能会发现 bootstrap-react-apollo installPostGraphile.js 文件是开始的好地方。

无法将数据库与 postgraphile 连接

Can't connect database with postgraphile

postgresql

graphql

postgraphile