Altering JSON response in rails?

Question

I have a model named User and in many actions i am rendering the response as json. for ex while showing the user data, i am using

@user = User.find_by_id(params[:id]) render json: {data: @user}

Now i have a requirement that while responding user data i need to show only last 2 digit of the mobile number for ex) ********78, is there any way to achieve this, Because altering the response in each action will be too difficult so is there any way to write a common method for handling this situation.

benchwarmer · Accepted Answer · 2016-07-06 05:56:10Z

2

You can write a method in user model

user.rb

def as_json(options = {})
  # use options as per need
  {id: self.id, name: self.name, mobile: mask}
end

def mask
  # masking logic
end

You can write a method which masks the initial characters and do render json: {data: @user.as_json)}

Checkout this link

edited Jul 6, 2016 at 5:56

answered Jul 6, 2016 at 4:49

benchwarmer

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5 Comments

Bala Karthik Over a year ago

i have executed what u have said but in a different way render json: {data: @user.as_json(only: [:id, :email]), methods: :mask}, but i having response { "id": 121, "email":"[email protected]", "mask": "********45"} ie the name of the method is the key of the mobile number. Can please find out what is the problem.

benchwarmer Over a year ago

You can name the method whatever you want in json response

Bala Karthik Over a year ago

Thats where the problem is i need the response to be mobile number but for the masking logic "********" + self.mobile_number.slice(8,9), if the method name is mobile_number it will cause a infinite loop.

Bala Karthik Over a year ago

yes it is working right now. Thanks for your help.., but i have another issue, i have some columns to be excluded and some to be included it differs on different action, but if if am overriding the as_json like this i will not able to do so., is there any other alternatives.

Bala Karthik Over a year ago

Now i have solved it by using render json: {data: @user.as_json(only: [:id, :email]).merge(mobile_number: @user.mask)} but there is a another problem there are certain actions in which i need to show a list of user, this solution won't suit there.

Community · Accepted Answer · 2017-05-23 12:19:17Z

0

Finally i solved the problem by

def as_json(options = {})
  users = super
  users['mobile_number'] = "********" + users['mobile_number'].slice(8,9).last if users['mobile_number'].present?
  users
end

when i call

 render json: {data: @user.as_json}

even if @user can contain collection of record, the mobile number for each record will be rendered in the format ********78.

the response now will be

{
    “id”: 143,
    “email”:[email protected],
    “mobile_number”: “********67”
}

And thanks for benchwarmer's help.

edited May 23, 2017 at 12:19

CommunityBot

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answered Jul 6, 2016 at 7:36

Bala Karthik

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