ActiveModelSerializers::Model successor initialized with string keys fix

[yevhene]

Purpose

Fixing strange behavior of ActiveModelSerializers::Model successor when initialized with string keys hash

Changes

ActiveModelSerializers::Model is stringify keys on initialization

Additional helpful information

Example:

class User < ActiveModelSerializers::Model
  attr_accessor :name
end

class UserSerializer < ActiveModel::Serializer
  attribute :name
end

resource = User.new('key' => value)
serializer = UserSerializer.new(resource)
serializer.to_json #=> '{"name": null}'

[mention-bot]

@yevhene, thanks for your PR! By analyzing the annotation information on this pull request, we identified @bf4 and @dubadub to be potential reviewers

[NullVoxPopuli]

this looks good. Simple, to the point. I actually didn't know why someone would want to do this, but I checked AR, and it supports this. So.. neat.

Could you add a changelog entry?

[bf4]

@yevhene I'm pretty sure that behavior comes from ActiveModel::Model. Also, serializer.to_json is not the recommended way to serialize a model.

[yevhene]

@bf4 Yes, this behavior is comes with ActiveModel::Model, but ActiveModelSerializers::Model overrides it for some reason. Problem not in to_json.

[yevhene]

@NullVoxPopuli I was faced with this when I take raw data from database and wrap it with ActiveModelSerializers::Model descendant.

[yevhene]

@NullVoxPopuli I updated the changelog.

[NullVoxPopuli]

cool!, thanks!