void QgsEditorWidgetWrapper::updateConstraint( const QgsFeature &ft )
{
bool toEmit( false );
QString errStr( tr( "predicate is True" ) );
QString expression = layer()->editFormConfig().constraintExpression( mFieldIdx );
QString description;
QVariant value = ft.attribute( mFieldIdx );
if ( ! expression.isEmpty() )
{
description = layer()->editFormConfig().constraintDescription( mFieldIdx );
QgsExpressionContext context = layer()->createExpressionContext();
context.setFeature( ft );
QgsExpression expr( expression );
mValidConstraint = expr.evaluate( &context ).toBool();
if ( expr.hasParserError() )
errStr = expr.parserErrorString();
else if ( expr.hasEvalError() )
errStr = expr.evalErrorString();
else if ( ! mValidConstraint )
errStr = tr( "predicate is False" );
toEmit = true;
}
else
mValidConstraint = true;
if ( layer()->editFormConfig().notNull( mFieldIdx ) )
{
if ( !expression.isEmpty() )
{
QString fieldName = ft.fields().field( mFieldIdx ).name();
expression = "( " + expression + " ) AND ( " + fieldName + " IS NOT NULL)";
description = "( " + description + " ) AND NotNull";
}
else
{
description = QStringLiteral( "NotNull" );
expression = QStringLiteral( "NotNull" );
}
mValidConstraint = mValidConstraint && !value.isNull();
if ( value.isNull() )
errStr = tr( "predicate is False" );
toEmit = true;
}
if ( toEmit )
{
updateConstraintWidgetStatus( mValidConstraint );
emit constraintStatusChanged( expression, description, errStr, mValidConstraint );
}
}
void QgsEditorWidgetWrapper::updateConstraint( const QgsFeature &ft, QgsFieldConstraints::ConstraintOrigin constraintOrigin )
{
bool toEmit( false );
QgsField field = layer()->fields().at( mFieldIdx );
QString expression = field.constraints().constraintExpression();
QStringList expressions, descriptions;
if ( ! expression.isEmpty() )
{
expressions << expression;
descriptions << field.constraints().constraintDescription();
toEmit = true;
}
if ( field.constraints().constraints() & QgsFieldConstraints::ConstraintNotNull )
{
descriptions << tr( "Not NULL" );
if ( !expression.isEmpty() )
{
expressions << field.name() + QStringLiteral( " IS NOT NULL" );
}
else
{
expressions << QStringLiteral( "IS NOT NULL" );
}
toEmit = true;
}
if ( field.constraints().constraints() & QgsFieldConstraints::ConstraintUnique )
{
descriptions << tr( "Unique" );
if ( !expression.isEmpty() )
{
expressions << field.name() + QStringLiteral( " IS UNIQUE" );
}
else
{
expressions << QStringLiteral( "IS UNIQUE" );
}
toEmit = true;
}
QStringList errors;
bool hardConstraintsOk = QgsVectorLayerUtils::validateAttribute( layer(), ft, mFieldIdx, errors, QgsFieldConstraints::ConstraintStrengthHard, constraintOrigin );
QStringList softErrors;
bool softConstraintsOk = QgsVectorLayerUtils::validateAttribute( layer(), ft, mFieldIdx, softErrors, QgsFieldConstraints::ConstraintStrengthSoft, constraintOrigin );
errors << softErrors;
mValidConstraint = hardConstraintsOk && softConstraintsOk;
mIsBlockingCommit = !hardConstraintsOk;
mConstraintFailureReason = errors.join( ", " );
if ( toEmit )
{
QString errStr = errors.isEmpty() ? tr( "Constraint checks passed" ) : mConstraintFailureReason;
QString description = descriptions.join( ", " );
QString expressionDesc;
if ( expressions.size() > 1 )
expressionDesc = "( " + expressions.join( " ) AND ( " ) + " )";
else if ( !expressions.isEmpty() )
expressionDesc = expressions.at( 0 );
ConstraintResult result = !hardConstraintsOk ? ConstraintResultFailHard
: ( !softConstraintsOk ? ConstraintResultFailSoft : ConstraintResultPass );
updateConstraintWidgetStatus( result );
emit constraintStatusChanged( expressionDesc, description, errStr, result );
}
}