如何通过迁移创建表关系 Knex.js/express？答案

【问题标题】：How to create table relationships Knex.js/express through migration?如何通过迁移创建表关系 Knex.js/express？
【发布时间】：2021-07-12 12:10:57
【问题描述】：

我有我需要为我的后端应用程序创建的所有表，但是当我尝试为关系添加外键时，它会在调用迁移时引发错误。 数据库是 postgreSQL 目标：我想再制作 1 个表来引用将所有表链接到 1 个表的所有外键。就像这个例子一样。

exports.up = function (knex) {
  return knex.schema.createTable('Overview', (table) => {
    table.uuid('overview_id').primary()
    table
      .foreign('user_id')
      .references('user_id')
      .inTable('users')
      .onDelete('cascade')
    table
      .foreign('player_id')
      .references('player_id')
      .inTable('playerStats')
      .onDelete('cascade')
    table
      .foreign('registration_id')
      .references('registration_id')
      .inTable('registration')
      .onDelete('cascade')
    table
      .foreign('planet_id')
      .references('planet_id')
      .inTable('planetList')
      .onDelete('cascade')
    table
      .foreign('buildings_id')
      .references('buildings_id')
      .inTable('buildings')
      .onDelete('cascade')
    table
      .foreign('production_id')
      .references('production_id')
      .inTable('production')
      .onDelete('cascade')
    table
      .foreign('research_id')
      .references('research_id')
      .inTable('research')
      .onDelete('cascade')
    table
      .foreign('player_fleet_id')
      .references('player_fleet_id')
      .inTable('playerFleet')
      .onDelete('cascade')
    table
      .foreign('player_defense_id')
      .references('player_defense_id')
      .inTable('playerDefense')
      .onDelete('cascade')
  })
}

【问题讨论】：

标签： node.js postgresql express knex.js

【解决方案1】：

exports.up = function (knex) {
  return knex.schema.createTable('Overview', (table) => {
    table.uuid('overview_id').primary()
    table.integer('user_id').notNullable()
    table
      .foreign('user_id')
      .references('user_id')
      .inTable('users')
      .onDelete('cascade')
    table.integer('player_id')
    table
      .foreign('player_id')
      .references('player_id')
      .inTable('playerStats')
      .onDelete('cascade')
    table.integer('registration_id')
    table
      .foreign('registration_id')
      .references('registration_id')
      .inTable('registration')
      .onDelete('cascade')
    table.integer('planet_id')
    table
      .foreign('planet_id')
      .references('planet_id')
      .inTable('planetList')
      .onDelete('cascade')
    table.integer('buildings_id')
    table
      .foreign('buildings_id')
      .references('buildings_id')
      .inTable('buildings')
      .onDelete('cascade')
    table.integer('production_id')
    table
      .foreign('production_id')
      .references('production_id')
      .inTable('production')
      .onDelete('cascade')
    table.integer('research_id')
    table
      .foreign('research_id')
      .references('research_id')
      .inTable('research')
      .onDelete('cascade')
    table.integer('player_fleet_id')
    table
      .foreign('player_fleet_id')
      .references('player_fleet_id')
      .inTable('playerFleet')
      .onDelete('cascade')
    table.integer('player_defense_id')
    table
      .foreign('player_defense_id')
      .references('player_defense_id')
      .inTable('playerDefense')
      .onDelete('cascade')
    table.integer('store_id')
    table
      .foreign('store_id')
      .references('store_id')
      .inTable('store')
      .onDelete('cascade')
  })
}

【讨论】：