knex migration:latest 无法连接，而 psql 工作正常

Question

我需要帮助来弄清楚为什么我不能运行在我的本地机器上迁移 knex 使用。 knex 似乎在连接到 postgres 数据库时遇到了一些问题。运行 knex migration:latest 在终端给我这个错误：

⇒  knex migrate:latest
Using environment: development
Error: Unable to acquire a connection
at Client_PG.acquireConnection (/Users/moldot/prjx-albert/server/node_modules/knex/lib/client.js:332:40)
at Runner.ensureConnection (/Users/moldot/prjx-albert/server/node_modules/knex/lib/runner.js:233:24)
at Runner.run (/Users/moldot/prjx-albert/server/node_modules/knex/lib/runner.js:47:42)
at SchemaBuilder.Target.then (/Users/moldot/prjx-albert/server/node_modules/knex/lib/interface.js:39:43)
at Migrator._ensureTable (/Users/moldot/prjx-albert/server/node_modules/knex/lib/migrate/index.js:256:66)
at Migrator._listCompleted (/Users/moldot/prjx-albert/server/node_modules/knex/lib/migrate/index.js:405:17)

我在本地 Macbook 上使用 postgres。这是我的 knexfile:

var PostgressConnectionStringParser = require('pg-connection-string');

module.exports = {
  heroku: {
    client: 'pg',
    connection: process.env.DATABASE_URL,
    migrations: {
      directory: "migrations",
      tableName: "migrations",
    },
  },
  development: {
    client: "pg",
    host: "localhost",
    port: 5432,
    username: "moldot",
    database: "c_dev",
    migrations: {
      directory: "migrations",
      tableName: "migrations",
    },
    ssl: true,
  },
}

运行 psql 工作正常：

⇒  psql -h localhost -p 5432 -U moldot -d c_dev
psql (10.1, server 9.5.4)
Type "help" for help.

c_dev=#

我运行在 knexfile.js 所在的同一目录中执行命令。谢谢！

Answer 1

您的 knexfile 语法无效。您还没有在此处提供 connection 属性。

它应该是这样的：

module.exports = {
  heroku: {
    client: 'pg',
    connection: process.env.DATABASE_URL,
    migrations: {
      directory: "migrations",
      tableName: "migrations"
    }
  },
  development: {
    client: "pg",
    connection: {
      host: "localhost",
      port: 5432,
      username: "moldot",
      database: "c_dev",
    },
    migrations: {
      directory: "migrations",
      tableName: "migrations"
    }
  }
}

knex migration:latest 无法连接，而 psql 工作正常

knex migration:latest cannot connect while psql works fine

javascript

postgresql

knex.js

postgresql-9.5