Question

我有两个模型“比赛”和“团队”。它们的架构如下：-

migrations/20180809010359_teams.js

exports.up = function(knex, Promise) {
  return knex.schema.createTable('teams', (table) => {
      table.increments('id');
      table.string('name').notNullable();
      table.text('image').notNullable().defaultTo('');
      table
        .enu(
          'sport',
          ['cricket', 'football'],
          { useNative: true, enumName: 'team_sport' }
        )
        .notNullable();
      table.unique(['name', 'sport']);
      table.timestamps();
  });
};

exports.down = function(knex, Promise) {
  return knex.schema.dropTable('teams');
};

migrations/20180809043147_matches.js

exports.up = function(knex, Promise) {
  return knex.schema.createTable('matches', (table) => {
      table.increments('id');
      table.string('title').notNullable();
      table.integer('team1').notNullable();
      table.integer('team2').notNullable();
      table.text('description').notNullable();
      table.dateTime('dateTime').notNullable();
      table.string('pollUrl').nullable();
      table.text('codes').nullable();
      table.json('images').nullable();
      table
        .enu(
          'sport',
          ['cricket', 'football'],
          { useNative: true, enumName: 'match_sport' }
        )
        .notNullable();
      table.foreign('team1').references('teams.id');
      table.foreign('team2').references('teams.id');
      table.unique(['team1', 'team2', 'dateTime']);
      table.timestamps();
  }).raw(`
    alter table "matches"
    add constraint "ensure_both_teams_are_diff" check(
      team1 <> team2
    ) 
  `);
};

exports.down = function(knex, Promise) {
  return knex.schema.dropTable('matches');
};

可以从迁移中推论得出。我试图指定一个Match属于一个Team作为team1列，而另一个Team属于team2列。

这是我的Team和Match的模型：-

models/Match.js

const bookshelf = require('../bookshelf');

const Match = bookshelf.Model.extend({
    tableName: 'matches',
    hasTimestamps: true,
    team1: function() {
      return this.belongsTo('Team', 'team1');
    },
    team2: function() {
      return this.belongsTo('Team', 'team2');
    }
});

module.exports = bookshelf.model('Match', Match);

models/Team.js

const bookshelf = require('../bookshelf');
const { Match } = require('./index');

const Team = bookshelf.Model.extend({
    tableName: 'teams',
    hasTimestamps: true,
    matches: function() {
      return this.hasMany('Match', 'team1');
    }
});

module.exports = bookshelf.model('Team', Team);

所以，我要坚持的重点是如何获得该团队可能在team1或team2列中的所有比赛

我确实尝试将matches函数修改为：-

matches: function() {
    return this.hasMany('Match', 'team1').add(this.hasMany('Match', 'team2').toJSON());
}

但是错误到(node:47098) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'parentFk' of undefined。

书架JS团队并匹配多个一对一关系以返回团队的所有匹配

0 个答案: