Json.jbuilder merge 2 json data and send it to one key

Question

I am using rails 5 and i am using jbuilder for sending json. The problem i am facing is i want to merge 2 table json and send it to same key..

my json.jbuilder look like this

json.children env.sites do |site|
  json.nodeId "site_#{site.id}"
  json.type "site"
  json.extract! site,:id, :key, :name
  json.children site.networks do |network|
    json.nodeId "network_#{network.id}"
    json.type "network"
    json.extract! network,:id, :name
    json.children network.vlans do |vlan|
      json.type "vlan"
      json.extract! vlan,:id, :name
    end
  end
  json.children site.instances do |instance|
    json.type "host"
    json.extract! instance,:id, :name
    json.content do
      json.cpu instance.cpu
    end
  end
end

Issue i am facing over here is i want to merge site.networks and site.instaces in same key.. How i would achieve this..??

same key as in? what is the current and expected json output? — Md. Farhan Memon
– Md. Farhan Memon, Commented Jul 4, 2017 at 13:11
Current output is override the children key with site.instances data and expected is it should merge site.networks and site.instances json — Ankita Agrawal
– Ankita Agrawal, Commented Jul 4, 2017 at 13:16
it doesn't help much. You just can't merge anything..many of your keys are same, can you post expected json output? what needs to be array and what needs to be hash? — Md. Farhan Memon
– Md. Farhan Memon, Commented Jul 4, 2017 at 13:36

Sujan Adiga · Accepted Answer · 2017-07-04 16:06:48Z

3

You can use json.array!

Try this,

json.children env.sites do |site|
  json.nodeId "site_#{site.id}"
  json.type "site"
  json.extract! site,:id, :key, :name
  json.children do
    json.array!(site.networks) do |network|
      json.nodeId "network_#{network.id}"
      json.type "network"
      json.extract! network,:id, :name
      json.children network.vlans do |vlan|
        json.type "vlan"
        json.extract! vlan,:id, :name
      end
    end
    json.array!(site.instances) do |instance|
      json.type "host"
      json.extract! instance,:id, :name
      json.content do
        json.cpu instance.cpu
      end
    end
  end
end

answered Jul 4, 2017 at 16:06

Sujan Adiga

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1 Comment

shubham mishra Over a year ago

The solution works but in my case, an additional requirement is for caching. Can I cache the 'site.networks' array in the above case as, # json.cache_collection! site.networks, key: 'site_network_array' do |network| ........ end

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