Added better Tenanting

* Removed Tenanting from base objects as some models may be tenantless
* Admins are naturally not restricted by tenants
* Users *ARE* the tenants (for now) so they don't require a tenant ID
either
* User-owned models should all include the Tenanted model as their base
* Created .Create and .Save methods attached to base model

models/base.go

@@ -1,7 +1,6 @@
 package models
 
 import (
-	"errors"
 	"time"
 
 	"github.com/google/uuid"
@@ -9,11 +8,10 @@ import (
 )
 
 type Base struct {
-	Uid     uuid.UUID `gorm:"type:uuid;primary_key;"`
+	Uid     uuid.UUID `gorm:"type:uuid;primary_key;<-:create"`
-	Created time.Time
+	Created time.Time `gorm:"<-:create"`
 	Updated time.Time
-	Deleted time.Time `sql:"index"`
+	Deleted time.Time `gorm:"index"`
-	Tenant  uuid.UUID `sql:"index"`
 }
 
 func (b *Base) BeforeCreate(scope *gorm.DB) error {
@@ -23,10 +21,6 @@ func (b *Base) BeforeCreate(scope *gorm.DB) error {
 }
 
 func (b *Base) BeforeSave(scope *gorm.DB) error {
-	if b.Tenant == uuid.Nil {
-		return errors.New("cannot save an untenanted object")
-	}
-
 	b.Updated = time.Now()
 	return nil
 }

models/tenanted.go

@@ -0,0 +1,21 @@
+package models
+
+import (
+	"errors"
+
+	"github.com/google/uuid"
+
+	"gorm.io/gorm"
+)
+
+type Tenanted struct {
+	Base
+	Tenant uuid.UUID `gorm:"index;<-:create"`
+}
+
+func (t *Tenanted) BeforeCreate(scope *gorm.DB) error {
+	if t.Tenant == uuid.Nil {
+		return errors.New("cannot save an untenanted object")
+	}
+	return nil
+}

models/user.go

@@ -11,7 +11,7 @@ import (
 
 type User struct {
 	Auth
-	Email string `gorm:"unique" sql:"index"`
+	Email string `gorm:"unique;index"`
 }
 
 const userJwtDuration = time.Hour * 24
@@ -24,7 +24,6 @@ func (u *User) GetJwt() (string, int) {
 		"iat":  time.Now().Unix(),
 		"exp":  time.Now().Add(userJwtDuration).Unix(),
 		"role": "user",
-		"tid":  u.Tenant.String(),
 	})
 
 	jstr, err := j.SignedString(UserHmac)