CODEWITHSUNDEEP
ruby-on-railsjson
tim_xyz
tim_xyz

Reputation: 13491

Rails controller is treating JSON object as a string

I have a static JSON file and want to iterate over it in an .html.erb template like,

<% @data.each do |x| %>
    <%= x['method'] %>
<% end %>

But I'm running into an error like below.

undefined method `each' for #<String:0x007ffb11e33de8>

Rails seems to be interpreting the JSON as a string.

Controller

def index
  @data = File.read("#{Rails.root}/data/docs.json")
end

docs.json

[
    {method: "POST", usage: "xyz"},
    {method: "DELETE", usage: "abc"},
    {method: "GET", usage: "mno"}
]

This is confusing because in my text editor I can simply iterate over a json object like,

data.each {|x| p x}

Can anyone explain why this works differently in a Rails app?

Upvotes: 0

Views: 274

Answers (1)

Roman Kiselenko
Roman Kiselenko

Reputation: 44370

First you should parse a Json file, because File.read return a string object thats why an error is raised undefined method 'each' for #<String:0x007ffb11e33de8>:

def index
  @data = JSON.parse(File.read("#{Rails.root}/data/docs.json"))
end

Also your file is not a valid JSON notation.

It should be:

[
    { "method": "POST", "usage": "xyz"},
    {"method": "DELETE", "usage": "abc"},
    {"method": "GET", "usage": "mno"}
]

Upvotes: 4

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