borinquenkid commented on code in PR #16701: URL: https://github.com/apache/grails-core/pull/16701#discussion_r4359460379
########## grails-data-hibernate7/core/src/test/groovy/org/grails/orm/hibernate/cfg/domainbinding/secondpass/SharedJoinTableUniqueKeyBinderSpec.groovy: ########## @@ -0,0 +1,136 @@ +/* + * 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.cfg.domainbinding.secondpass + +import grails.gorm.annotation.Entity +import grails.gorm.tests.HibernateGormDatastoreSpec +import org.hibernate.mapping.Collection +import org.hibernate.mapping.Table +import org.hibernate.mapping.UniqueKey +import spock.lang.Subject + +/** + * The join table two unidirectional hasMany associations to the same class share gets one implicit unique key from + * Hibernate, over the first association's key column and the element column. The binder adds the key column of every + * association that shares the table, so a row is unique by the key column of its own association and the element. + * An association with a join table of its own, and one whose key the other side owns, are left as Hibernate binds them. + */ + +class SharedJoinTableUniqueKeyBinderSpec extends HibernateGormDatastoreSpec { + + void setupSpec() { + manager.registerDomainClasses(SjtOwner, SjtSeparateOwner, SjtParent, SjtChild, SjtRole) + } + + private Collection collectionOf(Class owner, String property) { + datastore.metadata.getCollectionBinding("${owner.name}.${property}".toString()) + } + + private static List<List<String>> uniqueKeyColumns(Table table) { + table.uniqueKeys.values().collect { UniqueKey key -> key.columns*.name.sort() }.sort() + } + + void "the shared join table has one unique key over the key column of each association and the element"() { + given: + Collection roles = collectionOf(SjtOwner, 'roles') + Collection denyRoles = collectionOf(SjtOwner, 'denyRoles') + + expect: 'both associations share the table' + roles.collectionTable.is(denyRoles.collectionTable) + roles.collectionTable.columns*.name.sort() == ['sjt_owner_deny_roles_id', 'sjt_owner_roles_id', 'sjt_role_id'] + + and: 'its unique key covers both key columns and the element column' + uniqueKeyColumns(roles.collectionTable) == [['sjt_owner_deny_roles_id', 'sjt_owner_roles_id', 'sjt_role_id']] + + and: 'both keys are updatable, so rows of both associations are written' + roles.key.updateable + denyRoles.key.updateable + } + + void "an association with a join table of its own keeps the unique key Hibernate creates for it"() { + given: + Collection roles = collectionOf(SjtSeparateOwner, 'roles') + Collection denyRoles = collectionOf(SjtSeparateOwner, 'denyRoles') + + expect: + !roles.collectionTable.is(denyRoles.collectionTable) + uniqueKeyColumns(roles.collectionTable) == [['sjt_role_id', 'sjt_separate_owner_roles_id']] + uniqueKeyColumns(denyRoles.collectionTable) == [['sjt_role_id', 'sjt_separate_owner_deny_roles_id']] + } + + void "a bidirectional one-to-many has no join table and is left alone"() { + given: + Collection children = collectionOf(SjtParent, 'children') + + expect: + children.inverse + children.collectionTable.name == 'sjt_child' + children.collectionTable.uniqueKeys.isEmpty() + } + + void "bind leaves a collection without a join table or without a key alone"() { + given: + Collection children = collectionOf(SjtParent, 'children') + int before = children.collectionTable.uniqueKeys.size() + + when: + new Object() Review Comment: Replaced in 9066f901f1: the feature now calls `bind` on the bidirectional collection from the metadata, the one whose key the other side owns, and asserts the table gains neither a unique key nor an index. The dialect resolution has a row per dialect, and the DDL feature applies the uniqueness to a hand-built shared table and renders it with each dialect's exporters. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
