在activerecord哈希条件中添加高级语句

Question

我有一个哈希女巫包含许多条件，我想添加到它另一个条件，使用优越的声明我怎么能这样做 例如

    // conditions is a hash of conditions
conditions[:id]="> 100"
personels=Personel.find(:all, :conditions=>conditions)

Answer 1

通常（不确定我是否完全理解您的目标）您在Array中存储了多个条件，然后您只需使用数组<<附加运算符添加更多条件，类似于：

条件是数组：

conditions = []
conditions << "id > '100'"
conditions << "NAME LIKE '%#{params[:name]}%'"
#
# ... more conditions here
#
conditions = conditions.join(' AND ')
Personel.where(conditions)

条件是哈希：

conditions = {}
conditions[:id] = "> '100'"
conditions[:NAME] = "LIKE '%#{params[:name]}%'"
#
# ... more conditions here
#
conditions = conditions.map{|k,v| "#{k} #{v}"}.join(' AND ')
Personel.where(conditions)