ruby - 如何区分由 first_or_create 搜索或创建的

Question

我想区分由 first_or_create 搜索或创建。

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？

Answer 1

解决方法是使用 first_or_initialize 而不是 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