add before find hook,we need split table with it

callbacks/callbacks.go

@@ -50,6 +50,7 @@ func RegisterDefaultCallbacks(db *gorm.DB, config *Config) {
 	queryCallback := db.Callback().Query()
 	queryCallback.Register("gorm:query", Query)
 	queryCallback.Register("gorm:preload", Preload)
+	queryCallback.Register("gorm:before_query", BeforeQuery)
 	queryCallback.Register("gorm:after_query", AfterQuery)
 	queryCallback.Clauses = config.QueryClauses
 

callbacks/interfaces.go

@@ -34,6 +34,10 @@ type AfterDeleteInterface interface {
 	AfterDelete(*gorm.DB) error
 }
 
+type BeforeFindInterface interface {
+	BeforeFind(*gorm.DB) error
+}
+
 type AfterFindInterface interface {
 	AfterFind(*gorm.DB) error
 }

callbacks/query.go

@@ -228,6 +228,28 @@ func Preload(db *gorm.DB) {
 	}
 }
 
+func BeforeQuery(db *gorm.DB) {
+	if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && db.Statement.Schema.BeforeFind {
+		callMethod(db, func(value interface{}, tx *gorm.DB) (called bool) {
+			if db.Statement.Schema.BeforeFind {
+				if i, ok := value.(BeforeFindInterface); ok {
+					called = true
+					db.AddError(i.BeforeFind(tx))
+				}
+			}
+
+			if db.Statement.Schema.BeforeFind {
+				if i, ok := value.(BeforeFindInterface); ok {
+					called = true
+					db.AddError(i.BeforeFind(tx))
+				}
+			}
+
+			return called
+		})
+	}
+}
+
 func AfterQuery(db *gorm.DB) {
 	if db.Error == nil && db.Statement.Schema != nil && !db.Statement.SkipHooks && db.Statement.Schema.AfterFind && db.RowsAffected > 0 {
 		callMethod(db, func(value interface{}, tx *gorm.DB) bool {

schema/schema.go

@@ -36,7 +36,7 @@ type Schema struct {
 	BeforeUpdate, AfterUpdate bool
 	BeforeDelete, AfterDelete bool
 	BeforeSave, AfterSave     bool
-	AfterFind                 bool
+	BeforeFind, AfterFind     bool
 	err                       error
 	initialized               chan struct{}
 	namer                     Namer