Version:

class Attachment

Ruby on Rails 5.2.8.1

Since v5.2.8.1

Available in: v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

Attachments associate records with blobs. Usually that’s a one record-many blobs relationship, but it is possible to associate many different records with the same blob. If you’re doing that, you’ll want to declare with has_one/many_attached :thingy, dependent: false, so that destroying any one record won’t destroy the blob as well. (Then you’ll need to do your own garbage collecting, though).

Inherits from

ActiveRecord::Base

Methods (defined here)

# purge
# purge_later

Private methods

(2) Implementation detail — not part of the public API.

# analyze_blob_later
# identify_blob

Methods (inherited)

From ActiveModel::Conversion (4)

From ActiveModel::Naming (7)

# model_name
self. param_key
self. plural
self. route_key
self. singular
self. singular_route_key
self. uncountable?

From ActiveRecord::AttributeMethods (9)

From ActiveRecord::AutosaveAssociation (6)

From ActiveRecord::ConnectionHandling (8)

From ActiveRecord::Core (31)

From ActiveRecord::Enum (1)

# enum

From ActiveRecord::Inheritance (1)

# initialize_dup

From ActiveRecord::Integration (6)

From ActiveRecord::Locking::Pessimistic (2)

# lock!
# with_lock

From ActiveRecord::ModelSchema (12)

From ActiveRecord::NoTouching (1)

# no_touching?

From ActiveRecord::Persistence (25)

From ActiveRecord::QueryCache::ClassMethods (2)

# cache
# uncached

From ActiveRecord::Querying (2)

# count_by_sql
# find_by_sql

From ActiveRecord::Validations (4)

From ActiveSupport::Benchmarkable (1)

# benchmark

From ActiveSupport::DescendantsTracker (7)

From Object (17)

From ActiveModel::AttributeAssignment (2)

# assign_attributes
# attributes=

From ActiveModel::AttributeMethods (4)

From ActiveModel::Translation (3)

From ActiveModel::Validations (6)

From ActiveRecord::AttributeMethods::BeforeTypeCast (2)

From ActiveRecord::AttributeMethods::Dirty (13)

From ActiveRecord::AttributeMethods::PrimaryKey (7)

From ActiveRecord::AttributeMethods::Query (1)

# query_attribute

From ActiveRecord::AttributeMethods::Read (1)

# read_attribute

From ActiveRecord::AttributeMethods::Write (1)

# write_attribute

From ActiveSupport::Autoload (6)

From ActiveSupport::Concern (3)

From ActiveModel::Callbacks (1)

# define_model_callbacks

From ActiveModel::Dirty (9)

From ActiveModel::Validations::HelperMethods (10)

From ActiveSupport::Callbacks (1)

# run_callbacks