将相关模型纳入序列器的两种方法
原标题：Two Ways to Include Associated Models in a Serializer
This is My Models.
class Patient < ApplicationRecord
has_many :patient_segments
has_many :segments, through: :patient_segments
end
class Segment < ApplicationRecord
has_many :patient_segments
has_many :patients, through: :patient_segments
end
class PatientSegment < ApplicationRecord
belongs_to :patient
belongs_to :segment
end
So, Patient has many segments and also Segment has many Patients. and I made some PatientSerializer and I think there is two way to include segment in PatientSerializer
First Way
class PatientSerializer < ActiveModel::Serializer
attributes :id,
:name,
:description
has_many :segments
end
Second Way
class PatientSerializer < ActiveModel::Serializer
attributes :id,
:name,
:description,
:segments
end
I think both of these approaches work well, but I m not sure which one to use. Are there any differences between the two methods, and is one preferred over the other?
问题回答
Using has_many :segments is preferable as you re letting the serializer know that it s an association. This is important if you need more control later of how the assocation is serialized or if you re serializing to a format such as JSONAPI where assocations are handled differently than normal attributes.
If you just pass the method name to attributes the serializer will just call the method and try to make sense of the result.
相关问题
rails collection_select vs. select
collection_select and select Rails helpers: Which one should I use?
I can t see a difference in both ways. Both helpers take a collection and generates options tags inside a select tag. Is there a ...
SSL slowness in EC2
We ve deployed our rails app to EC2. In our setup, we have two proxies on small instances behind round-robin DNS. These run nginx load balancers for a dynamically growing and shrinking farm of web ...
Auth-code with A-Za-z0-9 to use in an URL parameter
As part of a web application I need an auth-code to pass as a URL parameter.
I am currently using (in Rails) :
Digest::SHA1.hexdigest((object_id + rand(255)).to_s)
Which provides long strings like :
...
RubyCAS-Client question: Rails
I ve installed RubyCAS-Client version 2.1.0 as a plugin within a rails app. It s working, but I d like to remove the ?ticket= in the url. Is this possible?
activerecord has_many :through find with one sql call
I have a these 3 models:
class User < ActiveRecord::Base
has_many :permissions, :dependent => :destroy
has_many :roles, :through => :permissions
end
class Permission < ActiveRecord::...
Ordering a hash to xml: Rails
I m building an xml document from a hash. The xml attributes need to be in order. How can this be accomplished?
hash.to_xml
Text Editor for Ruby-on-Rails
guys which text editor is good for Rubyonrails?
i m using Windows and i was using E-Texteditor but its not free n its expired now can anyone plese tell me any free texteditor?
n which one is best an ...
How to get SQL queries for each user where env is production
I’m developing an application dedicated to generate statistical reports, I would like that user after saving their stat report they save sql queries too. To do that I wrote the following module:
...
