如何区分first_or_create搜索或创建的内容

Question

我想区分搜索或由first_or_create创建.

record = MasterRecord.where(:name=>'test_data').firest_or_create

# and i want differentiate searched or created like this.
# but there is no created_record? method
if record.created_record?
    render :status=>200, :json => record.to_json
else
    render :status=>409, :json => record.to_json
end

我该怎么做呢？

Answer 1

一种解决方法使用起来会first_or_initialize代替first_or_create,然后使用new_record?如下:

record = MasterRecord.where(:name=>'test_data').first_or_initialize

created_record = record.new_record?
record.save! if record.new_record?

if created_record
    render :status=>200, :json => record.to_json
else
    render :status=>409, :json => record.to_json
end