Fixes grails/grails-data-mapping#1283

Prevent type conversion when criteria is instanceof org.hibernate.criterion.DetachedCriteria.

Author: puneetbehl

grails-datastore-gorm-hibernate5/src/main/groovy/org/grails/orm/hibernate/query/AbstractHibernateQuery.java

@@ -164,10 +164,10 @@ else if (criterion instanceof PropertyCriterion) {
             Object value = pc.getValue();
             if (value instanceof QueryableCriteria) {
                 setDetachedCriteriaValue((QueryableCriteria) value, pc);
-            }
-            // ignore Size related constraints
-            else {
-                doTypeConversionIfNeccessary(getEntity(), pc);
+            } else {
+                if (!(value instanceof DetachedCriteria)) {
+                    doTypeConversionIfNeccessary(getEntity(), pc);
+                }
             }
         }
         if (criterion instanceof DetachedAssociationCriteria) {
@@ -266,6 +266,7 @@ protected String getCurrentAlias() {
 
     @SuppressWarnings("unchecked")
     static void doTypeConversionIfNeccessary(PersistentEntity entity, PropertyCriterion pc) {
+        // ignore Size related constraints
         if (pc.getClass().getSimpleName().startsWith(SIZE_CONSTRAINT_PREFIX)) {
             return;
         }

grails-datastore-gorm-hibernate5/src/test/groovy/grails/gorm/tests/DetachCriteriaSubquerySpec.groovy

@@ -9,7 +9,7 @@ class DetachCriteriaSubquerySpec extends GormDatastoreSpec {
 
     @Override
     List getDomainClasses() {
-        return [User, Group, GroupAssignment]
+        return [User, Group, GroupAssignment, Organisation]
     }
 
     void "test detached associated criteria in subquery"() {
@@ -43,6 +43,30 @@ class DetachCriteriaSubquerySpec extends GormDatastoreSpec {
         result.size() == 1
     }
 
+    void "test executing detached criteria in sub-query multiple times"() {
+
+        setup:
+        Organisation orgA = new Organisation(name: "A")
+        orgA.addToUsers(email: 'user1@a')
+        orgA.addToUsers(email: 'user2@a')
+        orgA.addToUsers(email: 'user3@a')
+        orgA.save(flush: true)
+        Organisation orgB = new Organisation(name: "B")
+        orgB.addToUsers(email: 'user1@b')
+        orgB.addToUsers(email: 'user2@b')
+        orgB.save(flush: true)
+
+        when:
+        DetachedCriteria<User> criteria = User.where {
+            inList('organisation', Organisation.where { name == 'A' || name == 'B' }.id())
+        }
+        List<User> result = criteria.list()
+        result = criteria.list()
+
+        then:
+        result.size() == 5
+    }
+
     void "test that detached criteria subquery should create implicit alias instead of using this_"() {
 
         setup:
@@ -74,9 +98,11 @@ class DetachCriteriaSubquerySpec extends GormDatastoreSpec {
     }
 
     private User createUser(String email) {
-        User user = new User()
-        user.email = email
-        user.save(flush: true)
+        User user = new User(email: email)
+        Organisation defaultOrg = Organisation.findOrCreateByName("default")
+        defaultOrg.addToUsers(user)
+        defaultOrg.save(flush: true)
+        user
     }
 
     private Group createGroup(String name, User supervisor) {
@@ -99,6 +125,7 @@ class DetachCriteriaSubquerySpec extends GormDatastoreSpec {
 @Entity
 class User implements HibernateEntity<User> {
     String email
+    static belongsTo = [organisation: Organisation]
     static mapping = {
         table 'T_USER'
     }
@@ -121,3 +148,9 @@ class GroupAssignment implements HibernateEntity<GroupAssignment> {
         table 'T_GROUP_ASSIGNMENT'
     }
 }
+
+@Entity
+class Organisation implements HibernateEntity<Organisation> {
+    String name
+    static hasMany = [users: User]
+}