[WIP] QOR Admin article

code/qor/v1/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/Depado/articles/code/qor/migrate"
+	"github.com/gin-gonic/gin"
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/postgres"
+	"github.com/qor/admin"
+	uuid "github.com/satori/go.uuid"
+	"github.com/sirupsen/logrus"
+)
+
+type product struct {
+	ID        uuid.UUID `gorm:"primary_key;type:uuid;default:uuid_generate_v4()"`
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	DeletedAt *time.Time
+
+	Name  string
+	Price int
+}
+
+func main() {
+	var db *gorm.DB
+	var err error
+	if db, err = gorm.Open(
+		"postgres",
+		"user=qor dbname=qor_tutorial password=password sslmode=disable",
+	); err != nil {
+		logrus.WithError(err).Fatal("Couldn't initialize database connection")
+	}
+	defer db.Close()
+	if err = migrate.Start(db); err != nil {
+		logrus.WithError(err).Fatal("Couldn't run migration")
+	}
+
+	adm := admin.New(&admin.AdminConfig{SiteName: "Admin", DB: db})
+	mux := http.NewServeMux()
+	adm.MountTo("/admin", mux)
+
+	adm.AddResource(&product{})
+
+	r := gin.New()
+	r.Any("/admin/*resources", gin.WrapH(mux))
+	r.Run("127.0.0.1:8080")
+}

code/qor/v1/migrate/initial.go

@@ -0,0 +1,28 @@
+package migrate
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/jinzhu/gorm"
+	"gopkg.in/gormigrate.v1"
+)
+
+var initial = &gormigrate.Migration{
+	ID: "initial",
+	Migrate: func(tx *gorm.DB) error {
+		type product struct {
+			ID        uuid.UUID `gorm:"primary_key;type:uuid;default:uuid_generate_v4()"`
+			CreatedAt time.Time
+			UpdatedAt time.Time
+			DeletedAt *time.Time
+
+			Name  string
+			Price int
+		}
+		return tx.CreateTable(&product{}).Error
+	},
+	Rollback: func(tx *gorm.DB) error {
+		return tx.DropTable("products").Error
+	},
+}

code/qor/v1/migrate/migrate.go

@@ -0,0 +1,15 @@
+package migrate
+
+import (
+	"github.com/jinzhu/gorm"
+	"gopkg.in/gormigrate.v1"
+)
+
+// Start starts the migration process
+func Start(db *gorm.DB) error {
+	m := gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
+		uuidCheck,
+		initial,
+	})
+	return m.Migrate()
+}

code/qor/v1/migrate/uuid.go

@@ -0,0 +1,25 @@
+package migrate
+
+import (
+	"errors"
+
+	"github.com/jinzhu/gorm"
+	"gopkg.in/gormigrate.v1"
+)
+
+var uuidCheck = &gormigrate.Migration{
+	ID: "precheck",
+	Migrate: func(tx *gorm.DB) error {
+		var (
+			requiredext = "uuid-ossp"
+			count       int
+		)
+		if err := tx.Table("pg_extension").Where("extname = ?", requiredext).Count(&count).Error; err != nil {
+			return err
+		}
+		if count < 1 {
+			return errors.New("extension uuid-ossp doesn't exist in the target database but is required")
+		}
+		return nil
+	},
+}

code/qor/v2/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/Depado/articles/code/qor/migrate"
+	"github.com/gin-gonic/gin"
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/postgres"
+	"github.com/qor/admin"
+	uuid "github.com/satori/go.uuid"
+	"github.com/sirupsen/logrus"
+)
+
+type product struct {
+	ID        uuid.UUID `gorm:"primary_key;type:uuid;default:uuid_generate_v4()"`
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	DeletedAt *time.Time
+
+	Name  string
+	Price int
+}
+
+func main() {
+	var db *gorm.DB
+	var err error
+	if db, err = gorm.Open(
+		"postgres",
+		"user=qor dbname=qor_tutorial password=password sslmode=disable",
+	); err != nil {
+		logrus.WithError(err).Fatal("Couldn't initialize database connection")
+	}
+	defer db.Close()
+	if err = migrate.Start(db); err != nil {
+		logrus.WithError(err).Fatal("Couldn't run migration")
+	}
+
+	adm := admin.New(&admin.AdminConfig{SiteName: "Admin", DB: db})
+	mux := http.NewServeMux()
+	adm.MountTo("/admin", mux)
+
+	adm.AddResource(&product{})
+
+	r := gin.New()
+	r.Any("/admin/*resources", gin.WrapH(mux))
+	r.Run("127.0.0.1:8080")
+}

code/qor/v2/migrate/initial.go

@@ -0,0 +1,28 @@
+package migrate
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/jinzhu/gorm"
+	"gopkg.in/gormigrate.v1"
+)
+
+var initial = &gormigrate.Migration{
+	ID: "initial",
+	Migrate: func(tx *gorm.DB) error {
+		type product struct {
+			ID        uuid.UUID `gorm:"primary_key;type:uuid;default:uuid_generate_v4()"`
+			CreatedAt time.Time
+			UpdatedAt time.Time
+			DeletedAt *time.Time
+
+			Name  string
+			Price int
+		}
+		return tx.CreateTable(&product{}).Error
+	},
+	Rollback: func(tx *gorm.DB) error {
+		return tx.DropTable("products").Error
+	},
+}

code/qor/v2/migrate/migrate.go

@@ -0,0 +1,15 @@
+package migrate
+
+import (
+	"github.com/jinzhu/gorm"
+	"gopkg.in/gormigrate.v1"
+)
+
+// Start starts the migration process
+func Start(db *gorm.DB) error {
+	m := gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
+		uuidCheck,
+		initial,
+	})
+	return m.Migrate()
+}

code/qor/v2/migrate/uuid.go

@@ -0,0 +1,25 @@
+package migrate
+
+import (
+	"errors"
+
+	"github.com/jinzhu/gorm"
+	"gopkg.in/gormigrate.v1"
+)
+
+var uuidCheck = &gormigrate.Migration{
+	ID: "precheck",
+	Migrate: func(tx *gorm.DB) error {
+		var (
+			requiredext = "uuid-ossp"
+			count       int
+		)
+		if err := tx.Table("pg_extension").Where("extname = ?", requiredext).Count(&count).Error; err != nil {
+			return err
+		}
+		if count < 1 {
+			return errors.New("extension uuid-ossp doesn't exist in the target database but is required")
+		}
+		return nil
+	},
+}