Question

考虑以下代码将在AR查找中抛出：

conditions = []
conditions[:age] = params[:age] if params[:age].present?
conditions[:gender] = params[:gender] if params[:gender].present?

我需要在'profile'属性上添加另一个条件，即LIKE条件。我怎么能这样做，因为LIKE通常是通过数组完成的，而不是散列键。

Answer 1

您可以使用哈希条件对模型进行范围调整，然后对具有数组条件的范围执行find：

YourModel.scoped(:conditions => conditions).all(:conditions => ["profile like ?", profile])

Answer 2

以下是丑陋但它有效

conditions = {} #This should be Hash
conditions[:age] = params[:age] if params[:age].present?
conditions[:gender] = params[:gender] if params[:gender].present?
conditions[:profile] = '%params[:profile]%' if params[:profile].present?

col_str =""  #this is our column names string for conditions array

col_str = "age=:age" if params[:age].present?
col_str+= (col_str.blank?)? "gender=:gender"  :" AND gender=:gender" if params[:gender].present?
col_str +=  (col_str.blank?) 'profile like :profile' : ' AND profile like :profile' if params[:profile].present?

:conditions=>[col_str , conditions]

Answer 3

当您调用活动记录查找时，首先发送条件字符串，然后发送带有以下值的哈希：

:conditions => [ "age = :age AND gender = :gender AND profile LIKE :profile", conditions ]

这样你可以继续做你正在做的事情：）

将LIKE条件添加到Rails条件块

3 个答案: