EDA - histogram app constraints allow an integer ordinal but back end only allows continuous

[bobular]

production site and dev
GEMS 1
visualisation
histogram
x = Study year

Rserve log

2024-03-22 11:37:35.852115 Value is set to `count`. Resulting histogram object will represent counts of unique x-axis bins per group.
Error in validateHistogramPD(.histo, verbose) : 
  The independent axis must be continuous for a histogram.

Variable metadata. (type=integer, shape=ordinal)

apps constraints for pass->histogram

{
	"0": {
		"name": "histogram",
		"displayName": "Histogram",
		"description": "Visualize the distribution of a continuous variable",
		"projects": [
			"ClinEpiDB",
			"MicrobiomeDB"
		],
		"maxPanels": 1,
		"dataElementConstraints": [
			{
				"xAxisVariable": {
					"isRequired": true,
					"minNumVars": 1,
					"maxNumVars": 1,
					"allowedTypes": [
						"number",
						"date",
						"integer"
					],
					"description": "Variable must be a number or date."
				},
				"facetVariable": {
					"isRequired": false,
					"minNumVars": 1,
					"maxNumVars": 2,
					"maxNumValues": 10,
					"description": "Variable(s) must have 10 or fewer unique values and be of the same or a parent entity as the Overlay variable."
				},
				"overlayVariable": {
					"isRequired": false,
					"minNumVars": 1,
					"maxNumVars": 1,
					"maxNumValues": 8,
					"description": "Variable must have 8 or fewer unique values and be of the same or a parent entity as the X-axis variable."
				}
			}
		],
		"dataElementDependencyOrder": [
			[
				"xAxisVariable"
			],
			[
				"overlayVariable",
				"facetVariable"
			]
		]
	}
}

Seems that it should also be allowedShapes: [ 'continuous' ], ?

[bobular]

I think this would affect the map supporting histograms too.
I have not been able to find an integer ordinal variable for a mappable study, however.

[bobular]

Shouldn't we just change the histogram constraints in service-eda to only allow shape=continuous, @d-callan ?