I am a bit lost getting on board fast_jsonapi / active_model_serializers to build an API. I have the basics down but seem stuck on a custom solution.
I have this as a serializer:
class AreaSerializer
include FastJsonapi::ObjectSerializer
attributes :id, :name, :cost_center, :notes
has_many :children
end
In my area model I have:
has_many :children, -> { Area.where(ancestry: id) }
My controller looks like:
class Api::V1::AreasController < ApiController
def index
render json: AreaSerializer.new(Area.root).serialized_json
end
end
Areas are nested in a hierarchy with the ancestry gem. The output is:
{
"data": [{
"id": "1",
"type": "area",
"attributes": {
"id": 1,
"name": "Calgary",
"cost_center": "123456",
"notes": ""
},
"relationships": {
"children": {
"data": [{
"id": "3",
"type": "child"
}]
}
}
}, {
"id": "2",
"type": "area",
"attributes": {
"id": 2,
"name": "Edmonton",
"cost_center": "78946",
"notes": ""
},
"relationships": {
"children": {
"data": []
}
}
}]
}
I am looking for an out put like this:
{
"data": [{
"id": "1",
"type": "area",
"attributes": {
"id": 1,
"name": "Calgary",
"cost_center": "123456",
"notes": ""
},
"relationships": {
"areas": {
"data": [{
"id": "3",
"type": "area",
"attributes": {
"id": 3,
"name": "Child Area",
"cost_center": "123456",
"notes": ""
}
}]
}
}
}, {
"id": "2",
"type": "area",
"attributes": {
"id": 2,
"name": "Edmonton",
"cost_center": "78946",
"notes": ""
}
}]
}
The idea being where the nested relationship shows the details etc.
I started using the technique listed above but ended up forking and re-writing the jsonapi-serializer gem so it allows nesting (up to 4 levels deep) and does away with the concept of having
relationships
andattributes
keys. I was also frustrated that it only output ID and TYPE keys of which TYPE is redundant most of the time since the object typically stays the same class in an array as an example and people seldom use real polymorphism (although it still supports this and outputs ID/type for polymorphic relationships).Probably the best part of my re-write is that it allows deterministic field select-ability anywhere within the json key tree via a new
fields
input.https://github.com/rubesMN/jsonapi-serializer