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Grace Data Hibernate

Authors: Michael Yan

Version: 2023.3.0-SNAPSHOT

Table of Contents

1Introduction
1.1Release History
1.2Upgrade Notes
2Getting Started
2.1Common Problems
2.2Configuring Different Hibernate Versions
2.3Using GORM in Spring Boot
2.4Using GORM for Hibernate Outside Grails
3Quick Start Guide
3.1Basic CRUD
4Configuration
4.1Configuration Example
4.2Configuration Reference
4.3The Default Mapping & Constraints
4.4Hibernate Customization
5Domain Modelling in GORM
5.1Association in GORM
5.1.1Many-to-one and one-to-one
5.1.2One-to-many
5.1.3Many-to-many
5.1.4Basic Collection Types
5.2Composition in GORM
5.3Inheritance in GORM
5.4Sets, Lists and Maps
6Persistence Basics
6.1Transactional Write-Behind
6.2Saving and Updating
6.3Deleting Objects
6.4Understanding Cascading Updates and Deletes
6.5Eager and Lazy Fetching
6.6Configuring Eager Fetching
6.7Altering Fetch Strategy for a Query
6.8Using Batch Fetching
6.9Pessimistic and Optimistic Locking
6.10Modification Checking
7Querying with GORM
7.1Listing instances
7.2Retrieval by Database Identifier
7.3Dynamic Finders
7.4Where Queries
7.5Criteria
7.6Detached Criteria
7.7Hibernate Query Language (HQL)
8Advanced GORM Features
8.1Events and Auto Timestamping
8.2Custom ORM Mapping
8.2.1Table and Column Names
8.2.2Caching Strategy
8.2.3Inheritance Strategies
8.2.4Custom Database Identity
8.2.5Composite Primary Keys
8.2.6Database Indices
8.2.7Optimistic Locking and Versioning
8.2.8Eager and Lazy Fetching
8.2.9Custom Cascade Behaviour
8.2.10Custom Hibernate Types
8.2.11Derived Properties
8.2.12Custom Naming Strategy
8.3Default Sort Order
9Programmatic Transactions
9.1Using the withTransaction Method
9.2Using TransactionService
10GORM Data Services
10.1Data Service Basics
10.2Data Service Queries
10.3Query Joins
10.4Data Service Write Operations
10.5Validating Data Services
10.6RxJava Support
11Multiple Data Sources
11.1Configuring Multiple Data Sources
11.2Mapping Domain Classes to Data Sources
11.3Data Source Namespaces
11.4The ConnectionSources API
12Multi-Tenancy
12.1Multi-Tenancy Modes
12.2Multi-Tenancy Transformations
12.3Database Per Tenant
12.4Schema Per Tenant
12.5Partitioned Multi-Tenancy
12.6Understanding Tenant Resolvers
13Validation and Constraints
13.1Applying Constraints
13.2Referencing Instances in Constraints
13.3Cascade constraints validation
13.4Constraints Reference
13.5Constraints and Database Mapping
14GORM and Testing
14.1Unit Testing with Spock
14.2Unit Testing with JUnit
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