How to pass dynamic data as Body Data in JMeter while doing performance testing?

Question

Can you help me to pass dynamic data as body data for the below sampler.

{"dealer_code":"30274","version":"566","preview_date":"","exterior_color":{"name":"Energetic Orange Metallic","prcode":"F14 4M4M","mrdp":0,"price":"600"},"car_configurator_model_code":"C113KZ-GPJAPJA-GPLAPLA-GWZBWZB-GW05W05","model_year":"2023","sfid":"01t9q000000FRoGAAW","sub_brand":"PV","model_code":"C113KZ/23"}

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I tried to pass the details as parameter but it didn't work.

Answer 1

You can substitute hard-coded values with the appropriate JMeter Functions or Variables directly in the "Body Data" tab of the HTTP Request sampler:

{
  "dealer_code": "30274",
  "version": "566",
  "preview_date": "",
  "exterior_color": {
    "name": "Energetic Orange Metallic",
    "prcode": "F14 4M4M",
    "mrdp": 0,
    "price": "600"
  },
  "car_configurator_model_code": "${configuratorModelCode}",
  "model_year": "${modelYear}",
  "sfid": "01t9q000000FRoGAAW",
  "sub_brand": "${subBrand}",
  "model_code": "${modelCode}"
}

The variables values should either be correlated (i.e. using data from the previous response) or parameterized using external data source (i.e. using CSV Data Set Config)