Auto-seeding

A component to auto generate seed data with ActiveRecord using a set of predefined or custom rules respecting models validations.

Install

Add to Gemfile: gem 'auto-seeding' (better in development group)
Edit the seed task:

auto_seeding = AutoSeeding::Seeder.new
3.times.each do
  auto_seeding.update( Author.new ).save!
end

Options

conf/seeder: seeding source [nil | :faker | :ffaker] (:faker requires Faker gem, :ffaker requires FFaker gem)
conf/file: load seed configuration from a local file
auto_create: array of nested associations to create while seeding (useful for has_one associations), ex. [:profile]
ignore_attrs: ignore some attributes, ex. [:id, updated_at]
skip_associations: array of nested associations to skip while seeding, ex. [:posts]
sources: configure sources rules for autoseed data

Conf file: see data folder

Global options (shared between instances):

AutoSeeding::Seeder.config({
  skip_associations: [:versions],
  conf: {
    seeder: :ffaker,
  },
})

Instance options:

autoseeding = AutoSeeding::Seeder.new({
  auto_create: [:profile],       # array of symbols
  conf: {
    file: 'test/conf.yml',       # string
    seeder: :faker,              # symbol - :faker or :ffaker
  },
  ignore_attrs: [:id],           # array of symbols - ignored attributes
  skip_associations: [:author],  # array of symbols - ignored nested associations
  sources: {                     # hash - keys: types, fields
    types: {                     # hash - override basic types rules
      integer: {
        source_model: 'Random',
        source_method: 'rand',
        source_args: '0..100',
      }
    },
    fields: [                    # array of hashes - override fields rules
      {
        in: ['name'],
        source_model: 'Faker::StarWars',
        source_method: 'character',
        type: 'string'
      },
      {
        regexp: '^(.+_|)title(|_.+)$',
        source_model: 'Faker::Book',
        source_method: 'title',
        post_process: '->( val ) { val + " (seeding)" }',
        type: 'string'
      }
    ]
  }
})

Notes

Generated data can be manipulated easily before saving:

obj = auto_seeding.update( Author.new )
obj.name = 'John Doe'
obj.save!

Field names can be changed using append and prepend options - example using Carrierwave remote url property:

AutoSeeding::Seeder.new({
  sources: {
    fields: [
      {
        regexp: '^(.+_|)photo(|_.+)$|^(.+_|)image(|_.+)$',
        source_model: 'Faker::Avatar',
        source_method: 'image',
        prepend: 'remote_',
        append: '_url',
        type: 'string'
      }
    ]
  }
}

To avoid problems with PaperTrail use:

AutoSeeding::Seeder.config({ skip_associations: [:versions] })

Do you like it? Star it!

If you use this component just star it. A developer is more motivated to improve a project when there is some interest.

Contributors

Mattia Roccoberton - creator, maintainer

License

MIT

auto-seeding

Development