Format :json error

Ruby
1

Hi I am new to Ruby and Json. Need help with this command being used in
Ruby, for parsing Json files.

I get the following error,

no implicit conversion of Symbol into String (TypeError)
./lib/pages/admin/summary_pg.rb:13:in `format’

This is how its being used,

class summarypage
def get_language_text(language, type, text)

if language.downcase == "french"
  format :json
  fr_file = File.read("/config/data/api/admin/labels_FR.json")
  fr_file_parsed = parse_file(fr_file)
  @text_fr = fr_file_parsed[type][text]
  end
@text_fr

end

def parse_file(language_file)
JSON.parse(language_file)
end
end

require ‘json’ is already included in another environment config file.

if I don’t use the format :json, I get the following error,

undefined method `[]’ for nil:NilClass (NoMethodError)

Appreciate the help. Thanks, Joel

2

require ‘json’

class SummaryPage
def get_language_text(language, type, text)

if language.downcase == "french"
  format "json"
  fr_file = DATA.read

  fr_file_parsed = parse_file(fr_file)
  @text_fr = fr_file_parsed[type][text]
  puts @text_fr

end

@text_fr

end

def parse_file(language_file)
JSON.parse(language_file)
end
end

SummaryPage.new.get_language_text(‘French’, ‘one’, ‘b’)

END
{
“one”: { “b” : “hello” },
“two”: “goodbye”
}

–output:–
hello

If you change the last line to:

SummaryPage.new.get_language_text('French', 'three', 'b')

then the output is:

1.rb:9:in get_language_text': undefined method[]’ for nil:NilClass
(NoMethodError)
from 1.rb:21:in `’

which comes from:

fr_file_parsed[“three”][“b”]

fr_file_parsed[‘three’] doesn’t exist, and when you try to retrieve a
non-existent key from a Hash, ruby returns nil. So that line is
equivalent to:

 nil["b"]

and you get the error: “undefined method `[]’ for nil:NilClass”

Calling the method Kernel#format does nothing–you don’t use it’s return
value, so it’s discarded. And you get the error:

 no implicit conversion of Symbol into String (TypeError)

because the format() method takes a string as an argument and
not a symbol. It looks like you copied the code from some rails code.

3

Awesome! Thank you so much!!! that solved my issue.