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jsongrailsgroovy

Grails : How to access the params coming as JSON format

from PHP application there is call to grails controller which sends data in JSON format.

when i println the params 

println params

which prints

[{"courseCategory":null,"courseId":null,"show":null,
    "rows":6,"trainers":null,"courses":null,"cities":null,
    "fromDate":null,"toDate":null,"pageType":"HOME","deal":null}:,   
    action:getTrainingsAsJson, 
    controller:publicTraining]

when i do

println  params.rows
println params.pageType

which prints null

i tried 

  def jsonObject = request.JSON  // prints [:]

I have also tried with JsonSlurper

def slurper = new JsonSlurper()
def result = slurper.parseText(params)

which gives error

No signature of method: groovy.json.JsonSlurper.parseText() is applicable for argument types: (org.codehaus.groovy.grails.web.servlet.mvc.GrailsParameterMap)

how to convert it to retrieve the param values?

or is there any way to convert it to map so that i can easily access the parameters?

Solution

  • If it is a POST request then the JSON can be retrieved from request as

    request.JSON
request.JSON.courseCategory

    etc

    What is see from the request the values are sent null from the client. Verify the payload.