我想在2个表中创建简单的html代码中的下拉列表,它们具有单一的关系,在我的代码中,我无法将关系数据与其他表列连接起来。例如,这是我的代码:
$user_accounts = UserAccountNumber::with('currencyType')->select('*', DB::raw('CONCAT("CardNumber: ", card_number) AS account_info'))
->whereUserId(Auth::user()->id)
->pluck('account_info', 'id');
此代码工作正常,但我希望将currencyType
表格列与UserAccountNumber
表格对齐,并且我无法将tableName.columnName用于DB::raw()
例如:
$user_accounts = UserAccountNumber::with('currencyType')
->select(
'*',
DB::raw('CONCAT(" CardNumber: ", card_number, "CurrencyType: ", currencyType.title) AS account_info'))
->whereUserId(Auth::user()->id)
->pluck('account_info', 'id');
然后我收到此错误:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'currencyType.currency_type' in 'field list' (SQL: select *, CONCAT("AccountNumber: ",account_number, " CardNumber: ", card_number, "CurrencyType: ", currencyType.currency_type) AS account_info from `user_account_numbers` where `user_id` = 17)
模型中的 currencyType
方法:
public function currencyType()
{
return $this->belongsTo(CurrencyType::class, 'currency_type', 'id');
}
答案 0 :(得分:1)
Laravel不使用JOIN来建立关系,因此您必须为此编写特定查询。使用查询构建器。
这样的事情应该有效:
$user_accounts = DB::table('user_account_numbers')
->join('currencyType', 'user_account_numbers.currency_id', '=', 'currencyType.id')
->select('*', DB::raw('CONCAT(" CardNumber: ", card_number, "CurrencyType: ", currencyType.title) AS account_info'))
->whereUserId(Auth::user()->id)
->get();
我希望您能够理解并根据您的数据库架构进行调整。