instance method
delete_all
Ruby on Rails 7.1.6
Since v3.0.20Signature
delete_all()Deletes the records without instantiating the records first, and hence not calling the #destroy method nor invoking callbacks. This is a single SQL DELETE statement that goes straight to the database, much more efficient than #destroy_all. Be careful with relations though, in particular :dependent rules defined on associations are not honored. Returns the number of rows affected.
Post.where(person_id: 5).where(category: ['Something', 'Else']).delete_all
Both calls delete the affected posts all at once with a single DELETE statement. If you need to destroy dependent associations or call your before_* or after_destroy callbacks, use the #destroy_all method instead.
If an invalid method is supplied, #delete_all raises an ActiveRecordError:
Post.distinct.delete_all
# => ActiveRecord::ActiveRecordError: delete_all doesn't support distinct
Source
# File activerecord/lib/active_record/relation.rb, line 651
def delete_all
return 0 if @none
invalid_methods = INVALID_METHODS_FOR_DELETE_ALL.select do |method|
value = @values[method]
method == :distinct ? value : value&.any?
end
if invalid_methods.any?
raise ActiveRecordError.new("delete_all doesn't support #{invalid_methods.join(', ')}")
end
arel = eager_loading? ? apply_join_dependency.arel : build_arel
arel.source.left = table
group_values_arel_columns = arel_columns(group_values.uniq)
having_clause_ast = having_clause.ast unless having_clause.empty?
key = if klass.composite_primary_key?
primary_key.map { |pk| table[pk] }
else
table[primary_key]
end
stmt = arel.compile_delete(key, having_clause_ast, group_values_arel_columns)
klass.connection.delete(stmt, "#{klass} Delete All").tap { reset }
end
Defined in activerecord/lib/active_record/relation.rb line 651
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Defined in ActiveRecord::Relation