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问题:
I have a JSON string that looks as below
'{\"test\":{\"test1\":{\"test1\":[{\"test2\":\"1\",\"test3\": \"foo\",\"test4\":\"bar\",\"test5\":\"test7\"}]}}}'
I need to change it to the one below using Ruby or Rails:
'{"test":{"test1":{"test1":[{"test2":"1","test3": "foo","test4":"bar","test5":"bar2"}]}}}'
I need to know how to remove those slashes.
回答1:
Use Ruby's String#delete!
method. For example:
str = '{\"test\":{\"test1\":{\"test1\":[{\"test2\":\"1\",\"test3\": \"foo\",\"test4\":\"bar\",\"test5\":\"test7\"}]}}}'
str.delete! '\\'
puts str
#=> {"test":{"test1":{"test1":[{"test2":"1","test3": "foo","test4":"bar","test5":"test7"}]}}}
回答2:
To avoid generating JSON
with backslashes in console, use puts
:
> hash = {test: 'test'}
=> {:test=>"test"}
> hash.to_json
=> "{\"test\":\"test\"}"
> puts hash.to_json
{"test":"test"}
You could also use JSON.pretty_generate
, with puts
of course.
> puts JSON.pretty_generate(hash)
{
"test": "test"
}
回答3:
Replace all backslashes with empty string using gsub
:
json.gsub('\\', '')
Note that the default output in a REPL uses inspect
, which will double-quote the string and still include backslashes to escape the double-quotes. Use puts
to see the string’s exact contents:
{"test":{"test1":{"test1":[{"test2":"1","test3": "foo","test4":"bar","test5":"test7"}]}}}
Further, note that this will remove all backslashes, and makes no regard for their context. You may wish to only remove backslashes preceding a double-quote, in which case you can do:
json.gsub('\"', '')
回答4:
I needed to print a pretty JSON array to a file. I created an array of JSON objects then needed to print to a file for the DBA to manipulate.
This is how i did it.
puts(((dirtyData.gsub(/\\"/, "\"")).gsub(/\["/, "\[")).gsub(/"\]/, "\]"))
It's a triple nested gsub that removes the \" first then removes the [" lastly removes the "]
I hope this helps
回答5:
Use JSON.parse()
JSON.parse("{\"test\":{\"test1\":{\"test1\":[{\"test2\":\"1\",\"test3\": \"foo\",\"test4\":\"bar\",\"test5\":\"test7\"}]}}}")
> {"test"=>{"test1"=>{"test1"=>[{"test2"=>"1", "test3"=>"foo", "test4"=>"bar", "test5"=>"test7"}]}}}
Note that the "json-string" must me double-quoted for this to work, otherwise \"
would be read as is instead of being "translated" to "
which return a JSON::ParserError Exception
.
回答6:
I tried the earlier approaches and they did not seem to fix my issue. My json still had backslashes. However, I found a fix to solve this issue.
myuglycode.gsub!(/\"/, '\'')