What is the proper way to update a record in Ruby on Rails? Just a single record. For example, I want to modify the name of the title somehow. A code snippet would be awesome!
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2 回答
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The basic way to update a record is like that :
@user.name = "new name"
@user.save
this assumes that @user in an instance of a User class having a name field.
you can also do mass_assignment with the update_attributes method
@user.update_attributes name: "new name", email: "new_email@foo.com"
If you want an exception to be raised if the record is invalid you can use the bang method instead, so here it would be save! & update_attributes!
You can also use the update_attribute which has been (or will be soon) renamed to update_column to update a single column while skipping the validation, but you should generally avoid using this method
more doc there
Finally you can use the write_attribute method
于 2012-10-28T23:30:22.217 回答
0
entity = Entity.find_by_name("some_name")
entity.title="new title"
entity.save!
or
Entity.find_by_name("some_name").update_attributes(:title => "new title")
for more details, refer to http://guides.rubyonrails.org
于 2012-10-28T23:29:50.043 回答