Map to String/String to Map conversion in Groovy

grails, groovy, json

Solution

Throwing my tests.

Using JSON converters in Grails, I think this should be the approach: (synonymous to @JamesKleeh and @GrailsGuy)

def json = '''{
                  "markings": {
                      "headMarkings": "Brindle",
                      "leftForeMarkings": "",
                      "rightForeMarkings": "sock",
                      "leftHindMarkings": "sock",
                      "rightHindMarkings": "",
                      "otherMarkings": ""
                   }
                }'''

def jsonObj = grails.converters.JSON.parse(json)
//This is your JSON object that should be passed in to the method
print jsonObj //[markings:[rightForeMarkings:sock, otherMarkings:, leftForeMarkings:, leftHindMarkings:sock, rightHindMarkings:, headMarkings:Brindle]]

def jsonStr = jsonObj.toString()
//This is the string which should be persisted in db
assert jsonStr == '{"markings":{"rightForeMarkings":"sock","otherMarkings":"","leftForeMarkings":"","leftHindMarkings":"sock","rightHindMarkings":"","headMarkings":"Brindle"}}'

//Get back json obj from json str
def getBackJsobObj = grails.converters.JSON.parse(jsonStr)
assert getBackJsobObj.markings.leftHindMarkings == 'sock'

Problem

I have a json object that gets passed into a save function as ``` { "markings": { "headMarkings": "Brindle", "leftForeMarkings": "", "rightForeMarkings": "sock", "leftHindMarkings": "sock", "rightHindMarkings": "", "otherMarkings": "" } ``` ** EDIT ** The system parses it and passes it to my function as a mapping. I don't actually have the JSON, although it wouldn't be difficult to build up the JSON myself, it just seems like overkill * END EDIT ** The `toString()` function ends up putting the results into the database as ``` "[rightForeMarkings:, otherMarkings:, leftForeMarkings:sock, leftHindMarkings:sock, rightHindMarkings:, headMarkings:brindle]" ``` I then want to save that as a string (fairly easy) by calling ``` params.markings.toString() ``` From here, I save the info and return the updated information. My issue is that since I am storing the object in the DB as a string, I can't seem to get the markings back out as a map (to then be converted to JSON). I have tried a few different things to no avail, although it is completely possible that I went about something incorrectlywith these... ``` Eval.me(Item.markings) evaluate(Item.markings) Item.markings.toList() ``` Thanks in advance for the help!

Original source

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