Seed dump is a simple plugin that adds a rake task named db:seed:dump.
It allows you to create a db/seeds.rb from your existing data in the database. When there is no data in the database it will generate empty create statements.
It mainly exists for people who are too lazy writing create statements in db/seeds.rb themselves and need something (seed_dump
) to dump data from the table(s) into seeds.rb
Dump all data directly to db/seeds.rb:
rake db:seed:dump
Dump only data from the users and products table and dump a maximum amount of 2 records:
$ rake db:seed:dump MODELS=User,Product LIMIT=2
Result:
$ cat db/seeds.rb # Autogenerated by the db:seed:dump task # Do not hesitate to tweak this to your needs products = Product.create([ { :category_id => 1, :description => "Long Sleeve Shirt", :name => "Long Sleeve Shirt" }, { :category_id => 3, :description => "Plain White Tee Shirt", :name => "Plain T-Shirt" } ]) users = User.create([ { :id => 1, :password => "123456", :username => "test_1" }, { :id => 2, :password => "234567", :username => "tes2" } ])
Append to db/seeds.rb instead of overwriting it:
rake db:seed:dump APPEND=true
Use another output file instead of db/seeds.rb
rake db:seed:dump FILE=db/categories.rb
By default the :id column will not be added to the generated create statements. If you do want the :id to be included use WITH_ID:
rake db:seed:dump WITH_ID=1
If you don’t want seed_dump
to dump any data allready available in the database use NO_DATA.
This will generate the dump with only 1 empty create statement. It’s up to you to edit these and change the values into something meaningful:
rake db:seed:dump MODEL=User NO_DATA=1 APPEND=true
If you want the dump to use ‘create!` rather than `create`:
rake db:seed:dump CREATE_METHOD='create!'
Here is a full example using all of the options above:
rake db:seed:dump MODELS=Category LIMIT=10 APPEND=true FILE=db/categories.rb WITH_ID=1 NO_DATA=1 CREATE_METHOD='create!'
APPEND:
Append the data to db/seeds.rb instead of overwriting it.
CREATE_METHOD:
Use the specified create method rather than 'create' (the default). Note: if you are using bash and want to use 'create!', be sure to use single quotes on the command line (i.e. CREATE_METHOD='create!').
FILE:
Use a different output file, default: db/seeds.rb
LIMIT:
Dump no more then this amount of data, default: no limit
MAX:
Split one create action per model to several create actions with MAX elements in each, default: no limit It usefull for large data dumping to reduce memory usage
MODEL(S):
A model name or a comma seperated list of models, default: all models
NO_DATA:
Don't dump any data from the db, instead generate empty Create options
WITH_ID:
Inlcude the +:id+ in the create options
TIMESTAMPS:
Include the :created_by and :updated_by timestamps (default)
SKIP_CALLBACKS:
Deactivate callbacks while importing.
PG_SCHEMA:
Postgres schema support
WITHOUT_PROTECTION:
Skip protection for columns that are protected by default. Note : WITH_ID and TIMESTAMPS automatically override protection
MODEL_DIR:
Specify an alternative model dir
Copyright © 2010 Rob Halff, released under the MIT license