fix: GormEnhancer.allQualifiers() overrides explicit datasource declarations for MultiTenant entities

grails-data-hibernate5/core/src/test/groovy/org/grails/orm/hibernate/connections/DataServiceMultiTenantMultiDataSourceSpec.groovy

@@ -0,0 +1,297 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+package org.grails.orm.hibernate.connections
+
+import org.hibernate.Session
+import org.hibernate.dialect.H2Dialect
+import spock.lang.AutoCleanup
+import spock.lang.Shared
+import spock.lang.Specification
+import spock.util.environment.RestoreSystemProperties
+
+import grails.gorm.MultiTenant
+import grails.gorm.annotation.Entity
+import grails.gorm.services.Service
+import grails.gorm.transactions.Transactional
+import org.grails.datastore.gorm.GormEnhancer
+import org.grails.datastore.gorm.GormEntity
+import org.grails.datastore.gorm.GormStaticApi
+import org.grails.datastore.mapping.core.DatastoreUtils
+import org.grails.datastore.mapping.multitenancy.MultiTenancySettings
+import org.grails.datastore.mapping.multitenancy.resolvers.SystemPropertyTenantResolver
+import org.grails.orm.hibernate.HibernateDatastore
+
+/**
+ * Tests GORM Data Service auto-implemented CRUD methods when both DISCRIMINATOR
+ * multi-tenancy and a non-default datasource are configured on the same domain.
+ *
+ * This combination triggers the allQualifiers() bug: when MultiTenant is present,
+ * allQualifiers() returns tenant IDs instead of datasource names, causing schema
+ * creation and query routing to go to the wrong database.
+ *
+ * Covers:
+ * - Schema creation on the correct (analytics) datasource for MultiTenant domains
+ * - save(), get(), delete(), count() with tenant isolation on secondary datasource
+ * - findBy* dynamic finders with tenant isolation on secondary datasource
+ * - GormEnhancer escape-hatch for aggregate HQL on secondary datasource
+ * - Tenant isolation: same-named data under different tenants stays separate
+ *
+ * @see PartitionedMultiTenancySpec for basic DISCRIMINATOR multi-tenancy
+ * @see MultipleDataSourceConnectionsSpec for Data Services on secondary datasource without multi-tenancy
+ */
+@RestoreSystemProperties
+class DataServiceMultiTenantMultiDataSourceSpec extends Specification {
+
+    @Shared @AutoCleanup HibernateDatastore datastore
+
+    void setupSpec() {
+        Map config = [
+                "grails.gorm.multiTenancy.mode": MultiTenancySettings.MultiTenancyMode.DISCRIMINATOR,
+                "grails.gorm.multiTenancy.tenantResolverClass": SystemPropertyTenantResolver,
+                'dataSource.url': "jdbc:h2:mem:grailsDB;LOCK_TIMEOUT=10000",
+                'dataSource.dbCreate': 'create-drop',
+                'dataSource.dialect': H2Dialect.name,
+                'dataSource.formatSql': 'true',
+                'hibernate.flush.mode': 'COMMIT',
+                'hibernate.cache.queries': 'true',
+                'hibernate.hbm2ddl.auto': 'create-drop',
+                'dataSources.analytics': [url: "jdbc:h2:mem:analyticsDB;LOCK_TIMEOUT=10000"],
+        ]
+
+        datastore = new HibernateDatastore(
+                DatastoreUtils.createPropertyResolver(config), Metric)
+    }
+
+    MetricService metricService
+
+    void setup() {
+        tenant = 'tenant1'
+        metricService = datastore
+                .getDatastoreForConnection('analytics')
+                .getService(MetricService)
+        metricService.deleteAll()
+        // Also clean tenant2 data
+        tenant = 'tenant2'
+        metricService.deleteAll()
+        // Reset to tenant1 for tests
+        tenant = 'tenant1'
+    }
+
+    void "schema is created on analytics datasource"() {
+        expect: 'The analytics datasource connects to the analyticsDB H2 database'
+        Metric.analytics.withNewSession { Session s ->
+            assert s.connection().metaData.getURL() == 'jdbc:h2:mem:analyticsDB'
+            return true
+        }
+
+        and: 'The default datasource connects to a different database'
+        datastore.withNewSession { Session s ->
+            assert s.connection().metaData.getURL() == 'jdbc:h2:mem:grailsDB'
+            return true
+        }
+    }
+
+    void "save routes to analytics datasource with tenant isolation"() {
+        when: 'A metric is saved under tenant1'
+        def saved = metricService.save(new Metric(name: 'page_views', amount: 100))
+
+        then: 'The metric is persisted with an ID'
+        saved != null
+        saved.id != null
+        saved.name == 'page_views'
+        saved.amount == 100
+
+        and: 'The metric is retrievable via the analytics datasource qualifier'
+        Metric.analytics.withNewSession {
+            Metric.analytics.get(saved.id) != null
+        }
+    }
+
+    void "get retrieves from analytics datasource"() {
+        given: 'A metric saved to the analytics datasource'
+        def saved = metricService.save(new Metric(name: 'sessions', amount: 42))
+
+        when: 'The metric is retrieved by ID'
+        def found = metricService.get(saved.id)
+
+        then: 'The correct metric is returned'
+        found != null
+        found.id == saved.id
+        found.name == 'sessions'
+        found.amount == 42
+    }
+
+    void "count returns count scoped to current tenant"() {
+        given: 'Metrics saved under tenant1'
+        metricService.save(new Metric(name: 'alpha', amount: 1))
+        metricService.save(new Metric(name: 'beta', amount: 2))
+
+        and: 'Metrics saved under tenant2'
+        tenant = 'tenant2'
+        metricService.save(new Metric(name: 'gamma', amount: 3))
+
+        when: 'Counting under tenant1'
+        tenant = 'tenant1'
+        def count1 = metricService.count()
+
+        and: 'Counting under tenant2'
+        tenant = 'tenant2'
+        def count2 = metricService.count()
+
+        then: 'Each tenant sees only its own data'
+        count1 == 2
+        count2 == 1
+    }
+
+    void "delete removes from analytics datasource"() {
+        given: 'A metric saved under tenant1'
+        def saved = metricService.save(new Metric(name: 'disposable', amount: 0))
+        def id = saved.id
+
+        when: 'The metric is deleted'
+        metricService.delete(id)
+
+        then: 'The metric is no longer retrievable'
+        metricService.get(id) == null
+        metricService.count() == 0
+    }
+
+    void "findByName routes to analytics datasource with tenant isolation"() {
+        given: 'Same-named metrics under different tenants'
+        metricService.save(new Metric(name: 'shared_name', amount: 100))
+        tenant = 'tenant2'
+        metricService.save(new Metric(name: 'shared_name', amount: 200))
+
+        when: 'Finding by name under tenant1'
+        tenant = 'tenant1'
+        def found1 = metricService.findByName('shared_name')
+
+        and: 'Finding by name under tenant2'
+        tenant = 'tenant2'
+        def found2 = metricService.findByName('shared_name')
+
+        then: 'Each tenant gets its own metric'
+        found1 != null
+        found1.amount == 100
+
+        found2 != null
+        found2.amount == 200
+    }
+
+    void "GormEnhancer resolves analytics qualifier for MultiTenant entity with explicit datasource"() {
+        when: 'Looking up the static API without specifying a connection'
+        def api = GormEnhancer.findStaticApi(Metric)
+
+        then: 'The API is registered and functional (schema exists on correct datasource)'
+        api != null
+
+        when: 'Using the explicit analytics qualifier'
+        def analyticsApi = GormEnhancer.findStaticApi(Metric, 'analytics')
+
+        then: 'The analytics API is also registered'
+        analyticsApi != null
+    }
+
+    void "GormEnhancer aggregate HQL routes to analytics datasource"() {
+        given: 'Multiple metrics saved under tenant1'
+        metricService.save(new Metric(name: 'alpha', amount: 10))
+        metricService.save(new Metric(name: 'beta', amount: 20))
+        metricService.save(new Metric(name: 'gamma', amount: 30))
+
+        when: 'Using GormEnhancer for an aggregate query'
+        def results = metricService.getTotalAmountAbove(15)
+
+        then: 'The HQL executes against the analytics datasource'
+        results.size() == 1
+        results[0] == 50  // 20 + 30
+    }
+
+    private static void setTenant(String tenantId) {
+        System.setProperty(SystemPropertyTenantResolver.PROPERTY_NAME, tenantId)
+    }
+}
+
+/**
+ * Metric domain mapped to the 'analytics' datasource with DISCRIMINATOR multi-tenancy.
+ * This combination triggers the allQualifiers() bug when both MultiTenant and
+ * a non-default datasource are configured.
+ */
+@Entity
+class Metric implements GormEntity<Metric>, MultiTenant<Metric> {
+    Long id
+    Long version
+    String tenantId
+    String name
+    Integer amount
+
+    static mapping = {
+        datasource 'analytics'
+    }
+
+    static constraints = {
+        name blank: false
+        amount min: 0
+    }
+}
+
+/**
+ * Data Service interface for Metric - all methods auto-implemented by GORM.
+ */
+interface MetricDataService {
+    Metric get(Serializable id)
+    Metric save(Metric metric)
+    void delete(Serializable id)
+    Long count()
+    Metric findByName(String name)
+    List<Metric> findAllByAmountGreaterThan(Integer amount)
+}
+
+/**
+ * Abstract class that binds MetricDataService to the 'analytics' datasource.
+ * The @Transactional(connection = "analytics") ensures all auto-implemented methods
+ * and custom methods route to the secondary datasource.
+ */
+@Service(Metric)
+@Transactional(connection = 'analytics')
+abstract class MetricService implements MetricDataService {
+
+    /**
+     * Statically compiled access to the analytics datasource via GormEnhancer.
+     */
+    private GormStaticApi<Metric> getAnalyticsApi() {
+        GormEnhancer.findStaticApi(Metric, 'analytics')
+    }
+
+    /**
+     * Delete all metrics for the current tenant from the analytics datasource.
+     */
+    void deleteAll() {
+        analyticsApi.executeUpdate('delete from Metric')
+    }
+
+    /**
+     * Aggregate query - calculates total amount of metrics above a threshold.
+     */
+    List getTotalAmountAbove(Integer minAmount) {
+        analyticsApi.executeQuery(
+            'select sum(m.amount) from Metric m where m.amount > :minAmount',
+            [minAmount: minAmount]
+        )
+    }
+}

grails-datamapping-core/src/main/groovy/org/grails/datastore/gorm/GormEnhancer.groovy

@@ -180,7 +180,23 @@ class GormEnhancer implements Closeable {
     List<String> allQualifiers(Datastore datastore, PersistentEntity entity) {
         List<String> qualifiers = new ArrayList<>()
         qualifiers.addAll(ConnectionSourcesSupport.getConnectionSourceNames(entity))
-        if ((MultiTenant.isAssignableFrom(entity.javaClass) || qualifiers.contains(ConnectionSource.ALL)) && (datastore instanceof ConnectionSourcesProvider)) {
+
+        // For MultiTenant entities OR entities declared with ConnectionSource.ALL,
+        // expand qualifiers to include all available connection sources — BUT only
+        // if the entity does not have an explicit non-DEFAULT datasource declaration.
+        //
+        // When a MultiTenant entity declares `datasource 'secondary'`, that explicit
+        // mapping must be preserved. Expanding to all connections causes silent
+        // data routing to the wrong database (the DEFAULT datasource) for
+        // DISCRIMINATOR multi-tenancy mode.
+        boolean isMultiTenant = MultiTenant.isAssignableFrom(entity.javaClass)
+        boolean hasExplicitAll = qualifiers.contains(ConnectionSource.ALL)
+        boolean hasExplicitNonDefaultDatasource = isMultiTenant &&
+                !hasExplicitAll &&
+                qualifiers.size() > 0 &&
+                !qualifiers.equals(ConnectionSourcesSupport.DEFAULT_CONNECTION_SOURCE_NAMES)
+
+        if ((isMultiTenant || hasExplicitAll) && !hasExplicitNonDefaultDatasource && (datastore instanceof ConnectionSourcesProvider)) {
             qualifiers.clear()
             qualifiers.add(ConnectionSource.DEFAULT)