How do you delete an ActiveRecord object?
How do you delete an ActiveRecord object?
I looked at Active Record Querying and it does not have anything on deleting that I can see.
Delete by id ,
Delete the current object like: user.remove ,
Can you delete based on a where clause?
It's destroy and destroy_all methods, like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent association options.
User.delete_all(condition: 'value') will allow you to delete records without a primary key
There is delete , delete_all , destroy , and destroy_all .
The docs are: older docs and Rails 3.0.0 docs
delete doesn't instantiate the objects, while destroy does. In general, delete is faster than destroy .
User.destroy User.destroy(1) will delete user with id == 1 and :before_destroy and :after_destroy callbacks occur. For example if you have associated records
has_many :addresses, :dependent => :destroy
After user is destroyed his addresses will be destroyed too. If you use delete action instead, callbacks will not occur.
User.destroy , User.delete
User.destroy_all(<conditions>) or User.delete_all(<conditions>)
Notice : User is a class and user is an instance object
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