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Field changes clear operands only when their value type changes · case 02

Field changes clear operands only when their value type changes is violated by the widget projection.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

A filter-builder row uses schema capability lists to determine available operators and reset incompatible operands when its field changes. This example checks: Field changes clear operands only when their value type changes.

Why this case matters

Filter-widget state and serialization must preserve user constraints while the view changes.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
contract fixture 0	`{"nullable-op": false, "operand-reset": 0, "operator-options": ["eq"], "retain-operator": "eq", "row-complete": true, "unknown-field": false}`	`{"nullable-op": false, "operand-reset": null, "operator-options": ["eq"], "retain-operator": "eq", "row-complete": true, "unknown-field": false}`	Failed

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