diff --git a/models/document.go b/models/document.go
index 0bd0f67..d6cf474 100644
--- a/models/document.go
+++ b/models/document.go
@@ -11,11 +11,11 @@ import (
 // @Description Сам по себе не содержит данных (они находятся в версиях и снапшотах).
 // swagger:model Document
 type Document struct {
-	ID            uuid.UUID `json:"id" gorm:"type:char(36);primaryKey" example:"550e8400-e29b-41d4-a716-446655440000"`
+	ID            uuid.UUID `json:"id" gorm:"type:uuid;default:gen_random_uuid();primaryKey" example:"550e8400-e29b-41d4-a716-446655440000"`
 	Name          string    `json:"name" example:"My Document"`
 	CreatedAt     time.Time `json:"created_at" example:"2025-01-02T15:04:05Z"`
 	UpdatedAt     time.Time `json:"updated_at" example:"2025-01-02T15:04:05Z"`
-	LatestVersion uuid.UUID `json:"latest_version" gorm:"type:char(36);" example:"c3e474u0-e29b-41d4-a716-446655440000"`
+	LatestVersion uuid.UUID `json:"latest_version" gorm:"type:uuid;" example:"c3e474u0-e29b-41d4-a716-446655440000"`
 }
 
 func (s *Document) TableName() (res string) {
diff --git a/models/version.go b/models/version.go
index ce8a817..8ebaf3b 100644
--- a/models/version.go
+++ b/models/version.go
@@ -13,10 +13,10 @@ import (
 // @Description Если IsSnapshot=false — Patch содержит JSON Patch относительно предыдущей версии.
 // swagger:model Version
 type Version struct {
-	ID         uuid.UUID  `json:"id" gorm:"type:char(36);primaryKey" example:"550e8400-e29b-41d4-a716-446655440001"`
-	DocumentID uuid.UUID  `json:"document_id" gorm:"type:char(36);index" example:"550e8400-e29b-41d4-a716-446655440000"`
-	Document   Document   `json:"-" gorm:"constraint:OnDelete:CASCADE;"`
-	ParentID   *uuid.UUID `json:"parent_id,omitempty" gorm:"type:char(36);" example:"null"`
+	ID         uuid.UUID  `json:"id" gorm:"type:uuid;default:gen_random_uuid();primaryKey" example:"550e8400-e29b-41d4-a716-446655440000"`
+	DocumentID uuid.UUID  `json:"document_id" gorm:"type:uuid;index" example:"550e8400-e29b-41d4-a716-446655440000"`
+	Document   *Document  `json:"-" gorm:"foreignKey:DocumentID;references:ID;constraint:OnDelete:CASCADE,OnUpdate:CASCADE;"`
+	ParentID   *uuid.UUID `json:"parent_id,omitempty" gorm:"type:uuid;" example:"null"`
 	IsSnapshot bool       `json:"is_snapshot" example:"false"`
 
 	// JSON Patch или nil, если Snapshot