class ActiveRecord::Base
Adds methods for deleting keys in your hstore columns
Public Class Methods
delete_key(attribute, key)
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Deletes all keys from a specific column in a model. E.g.
Person.delete_key(:info, :father)
The SQL generated will be:
UPDATE "people" SET "info" = delete("info",'father');
# File lib/activerecord-postgres-hstore/activerecord.rb, line 10 def self.delete_key attribute, key raise "invalid attribute #{attribute}" unless column_names.include?(attribute.to_s) update_all([%(#{attribute} = delete("#{attribute}",?)),key]) end
delete_keys(attribute, *keys)
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Deletes many keys from a specific column in a model. E.g.
Person.delete_key(:info, :father, :mother)
The SQL generated will be:
UPDATE "people" SET "info" = delete(delete("info",'father'),'mother');
# File lib/activerecord-postgres-hstore/activerecord.rb, line 19 def self.delete_keys attribute, *keys raise "invalid attribute #{attribute}" unless column_names.include?(attribute.to_s) delete_str = "delete(#{attribute},?)" (keys.count-1).times{ delete_str = "delete(#{delete_str},?)" } update_all(["#{attribute} = #{delete_str}", *keys]) end
Public Instance Methods
destroy_key(attribute, key)
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Deletes a key in a record. E.g.
witt = Person.find_by_name("Ludwig Wittgenstein") witt.destroy_key(:info, :father)
It does not save the record, so you’ll have to do it.
# File lib/activerecord-postgres-hstore/activerecord.rb, line 30 def destroy_key attribute, key raise "invalid attribute #{attribute}" unless self.class.column_names.include?(attribute.to_s) new_value = send(attribute) new_value.delete(key.to_s) send("#{attribute}=", new_value) self end
destroy_key!(attribute, key)
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Deletes a key in a record. E.g.
witt = Person.find_by_name("Ludwig Wittgenstein") witt.destroy_key(:info, :father)
It does save the record.
# File lib/activerecord-postgres-hstore/activerecord.rb, line 42 def destroy_key! attribute, key destroy_key(attribute, key).save end
destroy_keys(attribute, *keys)
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Deletes many keys in a record. E.g.
witt = Person.find_by_name("Ludwig Wittgenstein") witt.destroy_keys(:info, :father, :mother)
It does not save the record, so you’ll have to do it.
# File lib/activerecord-postgres-hstore/activerecord.rb, line 50 def destroy_keys attribute, *keys for key in keys new_value = send(attribute) new_value.delete(key.to_s) send("#{attribute}=", new_value) end self end
destroy_keys!(attribute, *keys)
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Deletes many keys in a record. E.g.
witt = Person.find_by_name("Ludwig Wittgenstein") witt.destroy_keys!(:info, :father, :mother)
It does save the record.
# File lib/activerecord-postgres-hstore/activerecord.rb, line 63 def destroy_keys! attribute, *keys raise "invalid attribute #{attribute}" unless self.class.column_names.include?(attribute.to_s) destroy_keys(attribute, *keys).save end