事情是这样的，有天写了一个左连接查询，由于表名太长，所以分别给起个别名，代码如下：
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public function detail(){ $result = TakeOrderModel::query() ->from('take_order as order') ->leftJoin('take_order_detail as detail', 'order.id', '=', 'detail.take_order_id') ->get(); dd($result);} |
执行后，报错 Column not found: 1054 Unknown column take_order.delete_time。
查看解决办法的，直接看底部
SQL:
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select * from take_order as orderleft join take_order_detail as detailon order.take_order_id = detail.take_order_idwhere take_order.delete_time is null |
显而易见：软删除查询条件的表名是全名，所以报错了。
分析
软删除作用域 SoftDeletingScope 源码：
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/** * Apply the scope to a given Eloquent query builder. * * @param \Illuminate\Database\Eloquent\Builder $builder * @param \Illuminate\Database\Eloquent\Model $model * @return void */public function apply(Builder $builder, Model $model){ $builder->whereNull($model->getQualifiedDeletedAtColumn());} |
查看 getQualifiedDeletedAtColumn 源码：
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/** * Get the fully qualified "deleted at" column. * * @return string */public function getQualifiedDeletedAtColumn(){ return $this->qualifyColumn($this->getDeletedAtColumn());} |
查看 qualifyColumn 源码：
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/** * Qualify the given column name by the model's table. * * @param string $column * @return string */public function qualifyColumn($column){ return $this->model->qualifyColumn($column);} |
查看 qualifyColumn 源码：
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/** * Qualify the given column name by the model's table. * * @param string $column * @return string */public function qualifyColumn($column){ if (Str::contains($column, '.')) { return $column; } return $this->getTable().'.'.$column;} |
以上可知： $this->getTable().'.'.$column 即为软删除条件的字段名。
解决办法
代码改成下面这样，加一行 setTable 设置表名，就可以了。
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$result = (new TakeOrderModel()) ->setTable('order') ->from('take_order as order') ->leftJoin('take_order_detail as detail', 'order.take_order_id', '=', 'detail.take_order_id') ->get(); |
因为写代码时要指定具体的查询 columns ，有时表名真的太长，看着很不舒服，所以有此尝试。嗯，9 点了，下班。
以上这篇Laravel 模型使用软删除-左连接查询-表起别名示例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://learnku.com/articles/16442/laravel-model-uses-soft-delete-left-join-query-table-alias
