How can I customize this render json output?

I’ve got a big problem. I’ve got some code doing a REST API, outputting
JSON, that works fine and hasn’t been touched in like 9 months. I’ve
also got a client out there in the wild that I can’t touch, so I can’t
muck with the API at all.

However in a recent bugfix update I"ve discovered that Rails has changed
a great deal under me, deprecated a lot of stuff, and I’m needing to
bring the code in line with modern expectations. That’s fine. Where I’m
stuck is my json rendering all changed.

Say that I’ve got an array of Scholarship objects with id, name, etc…
When I asked to render the json of an array of scholarships previously I
would get:

[{“scholarship”:{“id”:2, “name”:“foo”}}, {“scholarship”:{“id”:3,
“name”:“bar”…

in short, an array of key value pairs where I had to iterate over the
array and start by saying x[“scholarship”] to get at the data.

After update what I’m getting is:

[{“id”:2, “name”:“foo”}, {“id”:3, “name”:“bar”…

no root elements. Using the active record serializers I’ve gotten some
flexibility in specifying the root element, but now I either end up with
the above (no root element) or:

{“scholarships”:[“scholarships”:{“id”, 2…

where I get a root element for the whole Array that is then added to
every element.

Is anybody still with me and can help me unwind this? When rendering
the json for a scholarhip I need to specify the “scholarship” root tag
… and when rendering a collection of Scholarships I need to be able to
override and NOT show a root tag?

As noted I can’t change the client. so if my resulting JSON is not
identical to what it’s always been I’ve got a real problem!

Is this what you’re looking for?

selected_objects.map do |obj| {“scholarship” => obj} end.to_json

On Thursday, January 30, 2014 9:49:41 PM UTC, Ruby-Forum.com User wrote:

where I get a root element for the whole Array that is then added to
every element.

Is anybody still with me and can help me unwind this? When rendering
the json for a scholarhip I need to specify the “scholarship” root tag
… and when rendering a collection of Scholarships I need to be able to
override and NOT show a root tag?

Have you tried playing with the include_root_in_json setting?

If it comes to it you could always override as_json in your model or use
something like jbuilder to construct your json explicitly

Fred

On Feb 1, 2014, at 2:35 PM, Frederick C. wrote:

{“scholarships”:[“scholarships”:{“id”, 2…
Have you tried playing with the include_root_in_json setting?

If it comes to it you could always override as_json in your model or use
something like jbuilder to construct your json explicitly

+100 for jbuilder – using it today for the second time, and discovered
that I quite like it. If you lean back and try to do less, it works
better!

Walter

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