Clarify isSettable behavior for entity creation in DataProperty

[mahish]

Hi,
I’d like to confirm the intended behaviour of DataProperty.isSettable. I expected isSettable to control whether a property is updatable (i.e., isSettable === false → property cannot be changed after creation). However, it appears that this flag also affects entity creation. When creating a new entity, properties with isSettable: false end up being initialized as undefined even for initial data from server.

Is this the expected behaviour, or should isSettable only apply to updates?

Reference:

breeze-client/src/entity-metadata.ts

Lines 1480 to 1483 in 45070ba

	_updateTargetFromRaw(target: StructuralObject, raw: any, rawValueFn: Function) {
	// called recursively for complex properties
	this.dataProperties.forEach((dp) => {
	if (!dp.isSettable) return;

Thanks.

[steveschmitt]

@jtraband This one is for you.