nocobase/packages/plugins/china-region/src/server/collections/chinaRegions.ts

import { defineCollection } from '@nocobase/database';

export default defineCollection({
  namespace: 'china-region.china-region',
  duplicator: 'skip',
  name: 'chinaRegions',
  title: '中国行政区划',
  autoGenId: false,
  fields: [
    // 如使用代码作为 id 可能更节省，但由于代码数字最长为 12 字节，除非使用 bigint(64) 才够放置
    {
      name: 'code',
      type: 'string',
      // unique: true,
      primaryKey: true,
    },
    {
      name: 'name',
      type: 'string',
    },
    {
      name: 'parent',
      type: 'belongsTo',
      target: 'chinaRegions',
      targetKey: 'code',
      foreignKey: 'parentCode',
    },
    {
      name: 'children',
      type: 'hasMany',
      target: 'chinaRegions',
      sourceKey: 'code',
      foreignKey: 'parentCode',
    },
    {
      name: 'level',
      type: 'integer',
    },
  ],
});