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DocumentationCLI Referencegofasta generaterepository

gofasta g repository

Generates a model, migration pair, repository interface, and GORM-based repository implementation for a given resource. The repository layer handles all database operations (CRUD queries) and is the only layer that interacts directly with the database.

Aliases: repo

Usage

gofasta g repository <Name> [field:type ...]

This command has no flags.

Examples

Generate a repository with all CRUD methods:

gofasta g repository Product name:string price:float

Generate a repository for an article:

gofasta g repo Article title:string body:text published:bool

What It Generates

Running gofasta g repository Product name:string price:float creates the following files:

FileDescription
app/models/product.model.goGORM database model
db/migrations/000006_create_products.up.sqlCreate table migration
db/migrations/000006_create_products.down.sqlDrop table migration
app/repositories/interfaces/product_repository.goRepository interface
app/repositories/product.repository.goGORM implementation

Repository Interface

// app/repositories/interfaces/product_repository.go
package interfaces
 
import "myapp/app/models"
 
type ProductRepository interface {
    Create(product *models.Product) (*models.Product, error)
    FindAll(page, limit int) ([]models.Product, int64, error)
    FindByID(id string) (*models.Product, error)
    Update(id string, product *models.Product) (*models.Product, error)
    Delete(id string) error
}

Repository Implementation

// app/repositories/product.repository.go
package repositories
 
import (
    "myapp/app/models"
    repoInterfaces "myapp/app/repositories/interfaces"
    "gorm.io/gorm"
)
 
type ProductRepositoryImpl struct {
    db *gorm.DB
}
 
func NewProductRepository(db *gorm.DB) repoInterfaces.ProductRepository {
    return &ProductRepositoryImpl{db: db}
}
 
func (r *ProductRepositoryImpl) Create(product *models.Product) (*models.Product, error) {
    if err := r.db.Create(product).Error; err != nil {
        return nil, err
    }
    return product, nil
}
 
func (r *ProductRepositoryImpl) FindAll(page, limit int) ([]models.Product, int64, error) {
    var products []models.Product
    var total int64
 
    r.db.Model(&models.Product{}).Count(&total)
    err := r.db.Offset((page - 1) * limit).Limit(limit).Find(&products).Error
    return products, total, err
}
 
func (r *ProductRepositoryImpl) FindByID(id string) (*models.Product, error) {
    var product models.Product
    if err := r.db.Where("id = ?", id).First(&product).Error; err != nil {
        return nil, err
    }
    return &product, nil
}
 
func (r *ProductRepositoryImpl) Update(id string, product *models.Product) (*models.Product, error) {
    if err := r.db.Where("id = ?", id).Updates(product).Error; err != nil {
        return nil, err
    }
    return r.FindByID(id)
}
 
func (r *ProductRepositoryImpl) Delete(id string) error {
    return r.db.Where("id = ?", id).Delete(&models.Product{}).Error
}

Architecture

The repository sits between the service layer and the database:

Controller --> Service --> Repository --> Database (GORM)
  • Repositories receive a *gorm.DB instance via dependency injection
  • All methods return domain models, not DTOs
  • Soft deletes are used by default (via GORM’s DeletedAt field)
  • Pagination is handled with Offset and Limit
Last updated on
modelservice