Map - megastudy - floating visualizations - back end 400 errors related to imputing zeros when no imputation is required

[bobular]

This is a request for a histogram of a "Blood meal assay" variable:

https://qa.vectorbase.org/eda/apps/standalone-map-distributions/visualizations/histogram
POST data

{
	"config": {
		"barMode": "stack",
		"binSpec": {
			"type": "binWidth",
			"value": 6.67
		},
		"outputEntityId": "OBI_0002732",
		"valueSpec": "count",
		"xAxisVariable": {
			"entityId": "OBI_0002732",
			"variableId": "OBI_0002993"
		}
	},
	"filters": [
		{
			"entityId": "EUPATH_0000605",
			"stringSet": [
				"VBP0000832"
			],
			"type": "stringSet",
			"variableId": "POPBIO_8000215"
		},
		{
			"entityId": "GAZ_00000448",
			"max": 83.71554430601263,
			"min": -73.12494524712693,
			"type": "numberRange",
			"variableId": "OBI_0001620"
		},
		{
			"entityId": "GAZ_00000448",
			"left": -167.87109374000002,
			"right": -167.87109375000003,
			"type": "longitudeRange",
			"variableId": "OBI_0001621"
		}
	],
	"studyId": "VBP_MEGA"
}

A 400 error returns this message

400 Bad Request: POST https://qa.vectorbase.org/eda/apps/standalone-map-distributions/visualizations/histogram 
Traceid: 4bf463a829fc4b21981bbc24aa55080f 

{
  "status": "bad-request",
  "message": {
    "keyedErrors": {
      "single_tabular_dataset": [
        "Variable '{\"entityId\":\"OBI_0002732\",\"variableId\":\"EUPATH_0043227\"}' must be available on entity 'OBI_0002732'.",
        "Variable '{\"entityId\":\"OBI_0002732\",\"variableId\":\"OBI_0001909\"}' must be available on entity 'OBI_0002732'.",
        "Variable '{\"entityId\":\"OBI_0002732\",\"variableId\":\"PATO_0000047\"}' must be available on entity 'OBI_0002732'.",
        "Variable '{\"entityId\":\"OBI_0002732\",\"variableId\":\"UBERON_0000105\"}' must be available on entity 'OBI_0002732'."
      ]
    },
    "validationLevel": "RUNNABLE",
    "validationStatus": "FAILED",
    "errors": []
  }
}

OBI_0002732 is the "Blood meal assay" entity

Those four variables are the special "study-dependent vocabulary" variables on the sample entity. They shouldn't be needed here?

[d-callan]

this should be fixed in data service v7.7.3