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fix(ivy): throw if @Input and @ContentChild share a property (#28415)

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In View Engine, we supported @Input and @ContentChild annotations
on the same property. This feature was somewhat brittle because
it would only work for static queries, so it would break if a
content child was passed in wrapped in an *ngIf. Due to the
inconsistent behavior and low usage both internally and externally,
we will likely be deprecating it in the next version, and it does
not make sense to perpetuate it in Ivy.

This commit ensures that we now throw in Ivy if we encounter the
two annotations on the same property.

PR Close #28415
This commit is contained in:
Kara Erickson
2019-01-28 20:45:41 -08:00
committed by Jason Aden
parent 7d9aa67d8c
commit fdc6e159b4
4 changed files with 70 additions and 5 deletions
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4
packages/compiler-cli/src/ngtsc/annotations/src/directive.ts
View File

@ -394,6 +394,10 @@ export function queriesFromFields(
fields: {member: ClassMember, decorators: Decorator[]}[], reflector: ReflectionHost,
evaluator: PartialEvaluator): R3QueryMetadata[] {
return fields.map(({member, decorators}) => {
// Throw in case of `@Input() @ContentChild('foo') foo: any`, which is not supported in Ivy
if (member.decorators !.some(v => v.name === 'Input')) {
throw new Error(`Cannot combine @Input decorators with query decorators`);
}
if (decorators.length !== 1) {
throw new Error(`Cannot have multiple query decorators on the same class member`);
} else if (!isPropertyTypeMember(member)) {