ss-visit/app/Models/BaseForm.php

<?php

namespace App\Models;

class BaseForm extends SoftDeletesModel
{
    protected $casts = [];
    protected $appends = [];

    public function __construct()
    {
        parent::__construct();
        // 设置表
        $this->setTable(request('table_name'));
        // 设置关联关系
        $this->relation();
        // 设置json转数组字段
        $this->casts = $this->jsonToArray();
    }

    /**
     * 创建人关联
     * @return \Illuminate\Database\Eloquent\Relations\HasOne
     */
    public function admin()
    {
        return $this->hasOne(Admin::class, 'id', 'admin_id');
    }

    /**
     * 关联创建部门
     * @return \Illuminate\Database\Eloquent\Relations\HasOne
     */
    public function department()
    {
        return $this->hasOne(Department::class, 'id', 'department_id');
    }

    /**
     * 获取所有关联关系
     * $raw=true返回原始设置，false只输出关联关系名字数组
     */
    public function allRelationFields($raw = false)
    {
        $customFormRelation = request('customForm')->relation;
        if (empty($customFormRelation)) return [];
        $customFormRelation = $customFormRelation->filter(function ($item) {
            return !empty($item->link_table_name)
                && !empty($item->link_relation)
                && !empty($item->local_key)
                && !empty($item->foreign_key)
                && !empty($item->link_with_name);
        });
        // 输出原始数据
        if ($raw) return $customFormRelation;
        $customFormRelation = $customFormRelation->pluck('link_with_name')->toArray();
        $baseRelation = ['admin', 'department'];
        return array_merge($baseRelation, $customFormRelation);
    }

    /**
     * 构建关联关系
     */
    public function relation()
    {
        $customFormRelations = request('customForm')->relation;
        if (empty($customFormRelations)) return true;
        // 去除无效的关联
        $customFormRelations = $customFormRelations->filter(function ($item) {
            return !empty($item->link_table_name)
                && !empty($item->link_relation)
                && !empty($item->local_key)
                && !empty($item->foreign_key)
                && !empty($item->link_with_name);
        });
        foreach ($customFormRelations as $item) {
            // 关联其他表数据
            self::resolveRelationUsing($item->link_with_name, function ($fromModel) use ($item) {
                if ($item->link_table_name == 'uploads') {
                    // 上传关联
                    $relatedModel = (new Upload())->newQuery();
                } else {
                    $relatedModel = tableNameToModel($item->link_table_name);
                }
                return $fromModel->{$item->link_relation}($relatedModel, $this, $item->foreign_key, $item->local_key);
            });
        }
        return true;
    }

    /**
     * json字段转数组
     */
    public function jsonToArray()
    {
        $customFormFields = request('customFormFields');
        if (empty($customFormFields)) return [];
        $casts = $customFormFields->whereIn('edit_input', CustomFormField::getJsonFieldType())
            ->pluck('field')
            ->mapWithKeys(function ($item) {
                return [$item => 'json'];
            })->toArray();
        return $casts;
    }


}