how to pass parameters in azure pipeline using rest api? - azure

Question

I'm using postman to make rest requests to the azure API to run a pipeline that is in synapse, in terms of permissions and the token I already get them and it works, the problem is that the pipeline receives 3 parameters but I don't know how to pass them, so I have this request, example:
https://hvdhgsad.dev.azuresynapse.net/pipelines/pipeName/createRun?api-version=2020-12-01
and the parameters I added them in the body:
{
"parameters": {
"p_dir": {
"type": "string",
"defaultValue": "val1"
},
"container": {
"type": "string",
"defaultValue": "val"
},
"p_folder": {
"type": "string",
"defaultValue": "val3"
}
}
}
but when I validate the run that was launched with the request I get this.
{
"id": "xxxxxxxxxxxxxxx",
"runId": "xxxxxxxxxxxxxxxxxxxxx",
"debugRunId": null,
"runGroupId": "xxxxxxxxxxxxxxxxxxxx",
"pipelineName": "xxxxxxxxxxxxxxxxx",
"parameters": {
"p_dir": "",
"p_folder": "",
"container": ""
},
"invokedBy": {
"id": "xxxxxxxxxxxxxxxxx",
"name": "Manual",
"invokedByType": "Manual"
},
"runStart": "2021-07-20T05:56:04.2468861Z",
"runEnd": "2021-07-20T05:59:10.1734654Z",
"durationInMs": 185926,
"status": "Failed",
"message": "Operation on target Data flow1 failed: {\"StatusCode\":\"DF-Executor-SourceInvalidPayload\",\"Message\":\"Job failed due to reason: Data preview, debug, and pipeline data flow execution failed because container does not exist\",\"Details\":\"\"}",
"lastUpdated": "2021-07-20T05:59:10.1734654Z",
"annotations": [],
"runDimension": {},
"isLatest": true
}
the params are empty, so I don't know what's wrong or missing.
what is the correct way to pass them???
ref: https://learn.microsoft.com/en-us/rest/api/synapse/data-plane/pipeline/create-pipeline-run#examples

Answer 1

Just created an account to answer this as i've had the same issue.
I resolved this by just having the name of the variable and its subsequent value in the body JSON.
e.g.
{"variable": "value", "variable": "value"}
Found this by following the documentation you had posted, under request body it passes the name of the variable and the value directly into the JSON body.
{
"OutputBlobNameList": [
"exampleoutput.csv"
]
}
This particular example is a list/array so it confused me by adding the brackets [] if you are passing string parameters this is unneeded.