QgsRelation::isValid will return false if layers are deleted

m-kuhn · m-kuhn · commit 932e70a75631 · 2018-08-24T13:24:13.000+02:00
diff --git a/src/core/qgsrelation.cpp b/src/core/qgsrelation.cpp
@@ -326,7 +326,7 @@ QgsAttributeList QgsRelation::referencingFields() const
 
 bool QgsRelation::isValid() const
 {
-  return d->mValid;
+  return d->mValid && d->mReferencingLayer && d->mReferencedLayer;
 }
 
 bool QgsRelation::hasEqualDefinition( const QgsRelation &other ) const

Original file line number	Diff line number	Diff line change
`@@ -326,7 +326,7 @@ QgsAttributeList QgsRelation::referencingFields() const`
`326`	`326`
`327`	`327`	`bool QgsRelation::isValid() const`
`328`	`328`	`{`
`329`		`- return d->mValid;`
	`329`	`+ return d->mValid && d->mReferencingLayer && d->mReferencedLayer;`
`330`	`330`	`}`
`331`	`331`
`332`	`332`	`bool QgsRelation::hasEqualDefinition( const QgsRelation &other ) const`