Active model serializer each_serializer vs serializer

active model serializer root key
active model serializers type
activemodel::serializer::collectionserializer
rails jbuilder vs serializer
rails serializer has_many
rails json serializer
active model serializer polymorphic
activemodel::serializer options

I have noticed when I want to fetch the collection of objects (@user.all) I have to user each_serializer

render json: @users, root: 'data', each_serializer: User::ShowSerializer

whereas when I have to have a single object show action serializer works.

render json: @user, root: 'data', serializer: User::ShowSerializer

Please can anyone explain the difference between the two

Think of it as each iterator in Ruby.

When you have a single record @user no iteration required and in return get a single serialized resource, here we directly apply a serializer

render json: @user, root: 'data', serializer: User::ShowSerializer

Think this as

User::ShowSerializer(@user)

When you have a collection of records @user.all you have to iterate each resource to get a serialized collection of records, here we apply each_serializer

render json: @users, root: 'data', each_serializer: User::ShowSerializer

This this as

@users.each do |user|
  User::ShowSerializer(user)
end

ActiveModel::Serializer::CollectionSerializer each_serializer · Issue , rails jbuilder vs serializer rails json serializer render json: @users, root: 'data', each_serializer: User::ShowSerializer. whereas when I have to have a single  JSON (JavaScript Object Notation) is a format that can be used to store or exchange data. It is easy to read by humans and easy to parse by machines, which is why a lot of APIs use JSON. In this

For a collection

:serializer specifies the collection serializer and

:each_serializer specifies the serializer for each resource in the collection. For a single resource, the :serializer option is the resource serialize

Please take a look at this documentation for more detail

Active model serializer each_serializer vs serializer, TODO: unify naming of root, json_key, and _type. Right now, a serializer's json_key comes from the root option or the object's model name, by default. But, if a  each_serializer options seems not to work in 0.9.0. render json: collection, serializer: false, each_serializer: EachSerializer insead of specified serializer, it just returns serialised object. after downgrading to 0.8.2 everything works as expected.

Basically :serializer returns a JSON Object

and :each_serializer returns array of JSON Objects

File: README, Serializing json objects in Rails APis easily with Tricks and caveats when using ActiveModel::Serializer. Posted on Since, we want to return all user bookings, we render our JSON invoking the each_serializer statement:. We're starting simple and avoiding, at least at the outset, all the complications in AMS version, especially all the implicit behavior from guessing the serializer, to the association's serializer, to the serialization type, etc.

Class: ActiveModel::Serializer::CollectionSerializer , The documentation for Active Model Serializer is hit or miss, and isn't array and not an Active Record object, we have to use each_serializer . In this case, as User objects are being returned, grape-active_model_serializers will look for a serializer named UserSerializer. Array Roots. When serializing an array, the array root is set to the innermost namespace name if there is one, otherwise it is set to the route name.

Making Magic in Rails JSON APIs, Ruby on Rails uses and "ActiveModel::Serializers" that For collections, you need to specify "each_serializer:" instead of just "serializer:". ActiveModelSerializers brings convention over configuration to your JSON generation. ActiveModelSerializers works through two components: serializers and adapters. Serializers describe which attributes and relationships should be serialized. Adapters describe how attributes and relationships should be serialized.

Rails: Using Active Model Serializer with POROs , Using ActiveModel::Serializer, learn how to create the JSON responses User.​all render json: @users, each_serializer: UserSerializer end def  Active Model Serializer. Provides a basic serializer implementation that allows you to easily control how a given object is going to be serialized. On initialization, it expects two objects as arguments, a resource and options. For example, one may do in a controller: PostSerializer. new (@post,:scope => current_user). to_json

Comments
  • each_serializer is used when we have more then 1 record, serializer is used when we have single record
  • Ohh sir, you are here. !!