Databse migrations.

[perso/Immae/Projets/Cryptomonnaies/Cryptoportfolio/Front.git] / db / db.go

diff --git a/db/db.go b/db/db.go
index bc4b8b3f4e5a16d345849b3972e563b7e629f5ba..7f87201a354abb1d7a64a0e1166972ea758fa83f 100644 (file)
--- a/db/db.go
+++ b/db/db.go
@@ -1,9 +1,7 @@
 package db
 
 import (
-       "fmt"
-       "strings"
-
+       migrate "github.com/go-pg/migrations"
        "github.com/go-pg/pg"
        "github.com/go-pg/pg/orm"
        "github.com/jloup/utils"
@@ -25,15 +23,60 @@ func Init(config DBConfig) {
 
        DB = connect(config)
 
-       err = createSchema(DB)
+       err = migratedb()
        if err != nil {
-               log.Errorf("cannot create schemas %v\n", err)
+               log.Fatalf("cannot migratedb '%v'\n", err)
        }
+}
 
-       err = createIndexes(DB)
+func migratedb() error {
+       /* Remove after first MEP */
+       version, err := migrate.Version(DB)
        if err != nil {
-               log.Errorf("cannot create indexes %v\n", err)
+               return err
+       }
+
+       if version == 0 {
+               return migrate.SetVersion(DB, 1)
        }
+       /***/
+
+       mig := make([]migrate.Migration, 0)
+
+       for _, migration := range migrations {
+               mig = append(mig, migrate.Migration{
+                       Version: migration.Version,
+                       Up: func(db orm.DB) error {
+                               for _, query := range migration.Up {
+                                       _, err := db.Exec(query)
+                                       if err != nil {
+                                               return err
+                                       }
+                               }
+
+                               return nil
+                       },
+                       Down: func(db orm.DB) error {
+                               for _, query := range migration.Down {
+                                       _, err := db.Exec(query)
+                                       if err != nil {
+                                               return err
+                                       }
+                               }
+
+                               return nil
+                       },
+               })
+       }
+
+       oldVersion, newVersion, err := migrate.RunMigrations(DB, mig, "up")
+
+       if oldVersion != newVersion {
+               log.Infof("Migrate DB: %v -> %v", oldVersion, newVersion)
+       } else {
+               log.Infof("DB up-to-date: version '%v'", newVersion)
+       }
+       return err
 }
 
 func connect(config DBConfig) *pg.DB {
@@ -44,32 +87,3 @@ func connect(config DBConfig) *pg.DB {
                Addr:     config.Address,
        })
 }
-
-func createSchema(db *pg.DB) error {
-       for _, model := range []interface{}{&User{}, &MarketConfig{}} {
-               err := db.CreateTable(model, &orm.CreateTableOptions{IfNotExists: true})
-               if err != nil {
-                       return err
-               }
-       }
-       return nil
-}
-
-func createIndexes(db *pg.DB) error {
-       indexes := []struct {
-               TableName string
-               Name      string
-               Columns   []string
-       }{
-               {"market_configs", "market_name_user_id_idx", []string{"user_id", "market_name"}},
-       }
-
-       for _, index := range indexes {
-               _, err := db.Exec(fmt.Sprintf("CREATE UNIQUE INDEX IF NOT EXISTS %s ON %s (%s)", index.Name, index.TableName, strings.Join(index.Columns, ",")))
-               if err != nil {
-                       return err
-               }
-       }
-
-       return nil
-}