Sequel ruby validates_unique 不区分大小写

Question

我尝试使用 Sequel ORM 来验证一对（:name 和 :type）的唯一性：

def validate
    super    
    validates_unique [:name, :type]
end

但是Sequel默认是区分大小写的。我如何在不区分大小写的情况下验证这一点（不关心大写或小写）？像ActiveRecord的类似方式：

validates_uniqueness_of :name, :case_sensitive => false

Answer 1

不太好，但是 from the docs:

   # If you want to do a case insensitive uniqueness validation on a database that
   # is case sensitive by default, you can use:

   validates_unique :column, :where=>(proc do |ds, obj, cols|
     ds.where(cols.map do |c|
       v = obj.send(c)
       v = v.downcase if v
       [Sequel.function(:lower, c), v]
     end)
   end)

Sequel ruby validates_unique 不区分大小写

Sequel ruby validates_unique case insensitive

ruby

validation

sequel