Javascript knex迁移：psql正常工作时，无法连接最新版本

我需要帮助找出为什么不能在本地机器上运行knex迁移 使用。看来knex在连接postgres数据库时遇到了一些问题。在终端中运行

knex migration:latest

，会出现以下错误：

⇒  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)

我在本地的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=#

---

我正在knexfile.js所在的目录中运行该命令。谢谢大家!

您的knexfile的语法无效。您没有在那里指定

连接

属性

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"
    }
  }
}

---

可能是heroku，您可以连接到？。必须有另一个文件，其中knex基于env初始化。从该文件粘贴代码。