Rails .where() 查询不起作用 [英] Rails .where() query not working

问题描述

非常感谢您的帮助.我有一个 locations 和 ads 表.位置 has_many :ads我对位置模型执行以下查询.

Thanks a lot for your help. I have a locations and ads table. Location has_many :ads I perform the following query on Location Model.

@locations = Location.joins(:ads).where(@location_params.require(:location).permit(:id)).includes(:ads)

然后我想对 @locations 执行额外的查询并根据 :ads

Then I want to perform an additional query on @locations and filter it based on :ads

@locations = @locations.joins(:ads).where(ads: @ads_params.require(:ads).permit(:id)).includes(:ads)

此查询不起作用.它返回一个空对象.

This query does not work. It returns an empty object.

=> #<Location::ActiveRecord_Relation:0x1e29270>

这是参数:

1. location_params

1. location_params

@location_params.require(:location).permit(:id) 
<ActionController::Parameters {"id"=>1} permitted: true>

ads_params

ads_params

@ads_params.require(:ads).permit(:id)
<ActionController::Parameters {"id"=>1} permitted: true>

不允许像这样给出特定的列输入:

It is not permitted to give a specific column input like this:

@locations = Location.joins(:ads).where(locations: {id: 1}, ads: {id: 1})

我有 postgresql，我没想过使用 SQL，但我不确定.

I have postgresql, I did not think about using SQL, but I am not sure.

我正在使用 rails 控制台来执行此查询，以进行测试.

I am using rails console to do this query, for testing.

@location_params 
=> <ActionController::Parameters {"location"=><ActionController::Parameters {"id"=>1} permitted: false>} permitted: false>


@location_params.require(:location).permit(:id)
=> <ActionController::Parameters {"id"=>1} permitted: true>

@ads_params
=> <ActionController::Parameters {"ads"=><ActionController::Parameters {"id"=>1} permitted: false>} permitted: false>

@ads_params.require(:ads).permit(:id)
=> <ActionController::Parameters {"id"=>1} permitted: true>

推荐答案

试试这个，

ads_params = @ads_params.require(:ads).permit(:id).to_h
location_params = @location_params.require(:location).permit(:id).to_h
@locations = Location.joins(:ads).where(locations: location_params, ads: ads_params)

希望有帮助！

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