with_record

This gem could DRY your code and return association/relation with additioanl records. Could be used in case you have form with soft-deleted value.

The example of problem:

You have models 2 models: User and Project. User has many projects. Project belongs to "assignee" (or author).

Let's say you have "soft-delete" (for example using paranoia" gem) and deleted user. Same time, all projects are still available (you just have such logic).

Now you want to edit the project. And in the form you have a dropdown with all active users. In this case list will be blank (because user was deleted).

So usually you need to do something like:

# just an example with problem (!!!)
= f.input :assignee_id, as: :select, collection: User.all + [User.unscoped.find_by(id: f.object.assineed_id)]

But now you can do the following:

# just an example with solution
= f.input :assignee_id, as: :select, collection: User.all.with_record(f.object.assineed_id)

And as a bonus you can also call scopes for example:

User.all.with_record(f.object.assineed_id).ordered` # to return by first_name

Or

@project.users.with_record(42).ordered # to include user by ID
@project.users.with_records(42, 43, 44).ordered # to include user by ID's

Usage

This gem is adding two methods to ActiveRecord Relations and Associations - with_record(...) and with_records(...).

You can do the following:

    u1 = User.create(name: 'John')
    u2 = User.create(name: 'Bob')

    p1 = u1.projects.create(name: 'apple')
    p2 = u2.projects.create(name: 'google')
    p3 = u2.projects.create(name: 'amazon')

    assert_equal u1.projects.with_record(p2), [p1, p2]
    assert_equal u1.projects.with_records(p2, p3), [p1, p2, p3]
    assert_equal u1.projects.with_records([p2, p3]), [p1, p2, p3]

    assert_equal Project.where(id: p1.id).with_record(p2), [p1, p2]
    assert_equal Project.where(id: p1.id).with_records(p2, p3), [p1, p2, p3]
    assert_equal Project.where(id: p1.id).with_records([p2, p3]), [p1, p2, p3]

    assert_equal Project.where(id: p1.id).with_record(nil), [p1]    
    assert_equal Project.where(id: p1.id).with_records(nil), [p1]

Installation

Add this line to your application's Gemfile:

gem 'with_record'

And then execute:

$ bundle

Or install it yourself as:

$ gem install with_record

How it works and limitations

• it's adding 2 methods to AR Relations and Associations.
• it's executing original scope, returning and ID's (or other PK values), then adding a new ID into it and returning a new releation
• joins, includes, ... before call .with_record won't be returned in final scope

Contributing

You are welcome to contribute.

License

The gem is available as open source under the terms of the MIT License.