Use chained calls for query

server/server.go

@@ -40,8 +40,7 @@ func (m *usersServer) Register(ctx context.Context, in *proto.RegisterRequest) (
 
 	// Check for an existing user.
 	var u models.User
-	tx := m.db.First(&u, "email = ?", in.Form.Email)
-	if tx.RowsAffected != 0 {
+	if m.db.Where(&u, "email = ?", in.Form.Email).RowsAffected > 0 {
 		return nil, errors.New("User already exists.")
 	}
 
@@ -56,8 +55,7 @@ func (m *usersServer) Register(ctx context.Context, in *proto.RegisterRequest) (
 	u.UUID = uuid.NewString()
 	u.Email = in.Form.Email
 	u.Password = string(bytes)
-	tx = m.db.Create(&u)
-	if tx.RowsAffected == 0 {
+	if m.db.Create(&u).RowsAffected == 0 {
 		log.Fatalf("Failed to save user: %v", err)
 		return nil, errors.New("Failed to save user.")
 	}
@@ -74,8 +72,7 @@ func (m *usersServer) Login(ctx context.Context, in *proto.LoginRequest) (*proto
 
 	// Find the user.
 	var u models.User
-	tx := m.db.First(&u, "email = ?", in.Form.Email)
-	if tx.RowsAffected == 0 {
+	if m.db.Where(&u, "email = ?", in.Form.Email).RowsAffected > 0 {
 		return nil, errors.New("User not found.")
 	}
 
@@ -92,8 +89,7 @@ func (m *usersServer) Login(ctx context.Context, in *proto.LoginRequest) (*proto
 	}
 
 	// Save the token.
-	tx = m.db.Create(&s)
-	if tx.RowsAffected == 0 {
+	if m.db.Create(&s).RowsAffected == 0 {
 		return nil, errors.New("Failed to create session.")
 	}
 
@@ -109,13 +105,13 @@ func (m *usersServer) Login(ctx context.Context, in *proto.LoginRequest) (*proto
 func (m *usersServer) Logout(ctx context.Context, in *proto.LogoutRequest) (*proto.LogoutResponse, error) {
 	// Find the session.
 	var s models.Session
-	if tx := m.db.First(&s, "token = ?", in.Token.Token); tx.RowsAffected == 0 {
+	if m.db.First(&s, "token = ?", in.Token.Token).RowsAffected == 0 {
 		return nil, errors.New("Failed to find session.")
 	}
 
 	// Expire the token.
 	s.Expires = time.Now().UnixNano()
-	if tx := m.db.Save(&s); tx.RowsAffected == 0 {
+	if m.db.Save(&s).RowsAffected == 0 {
 		return nil, errors.New("Failed to close session.")
 	}
 
@@ -130,8 +126,7 @@ func (m *usersServer) Authorize(ctx context.Context, in *proto.AuthorizeRequest)
 
 	// Find the session.
 	var s models.Session
-	tx := m.db.First(&s, "token = ?", in.Token.Token)
-	if tx.RowsAffected == 0 {
+	if m.db.First(&s, "token = ?", in.Token.Token).RowsAffected == 0 {
 		return nil, errors.New("Session not found.")
 	}
 
@@ -142,8 +137,7 @@ func (m *usersServer) Authorize(ctx context.Context, in *proto.AuthorizeRequest)
 
 	// Find the user.
 	var u models.User
-	tx = m.db.Model(&models.User{}).Preload("Roles").First(&u, "id = ?", s.UserID)
-	if tx.RowsAffected == 0 {
+	if m.db.Model(&models.User{}).Preload("Roles").First(&u, "id = ?", s.UserID).RowsAffected == 0 {
 		return nil, errors.New("Failed to load roles.")
 	}
 
@@ -168,8 +162,7 @@ func (m *usersServer) Authorize(ctx context.Context, in *proto.AuthorizeRequest)
 func (m *usersServer) ResetPassword(ctx context.Context, in *proto.ResetPasswordRequest) (*proto.ResetPasswordResponse, error) {
 	// Find the u.
 	var u models.User
-	tx := m.db.First(&u, "email = ?", in.Form.Email)
-	if tx.RowsAffected == 0 {
+	if m.db.First(&u, "email = ?", in.Form.Email).RowsAffected == 0 {
 		return nil, errors.New("User not found.")
 	}
 
@@ -181,8 +174,7 @@ func (m *usersServer) ResetPassword(ctx context.Context, in *proto.ResetPassword
 	}
 
 	// Save the token.
-	tx = m.db.Create(rt)
-	if tx.RowsAffected == 0 {
+	if m.db.Create(rt).RowsAffected == 0 {
 		return nil, errors.New("Failed to create token.")
 	}
 
@@ -197,15 +189,13 @@ func (m *usersServer) ResetPassword(ctx context.Context, in *proto.ResetPassword
 func (m *usersServer) ChangePassword(ctx context.Context, in *proto.ChangePasswordRequest) (*proto.ChangePasswordResponse, error) {
 	// Find the reset token.
 	var rt models.PasswordToken
-	tx := m.db.First(&rt, "token = ?", in.Token.Token)
-	if tx.RowsAffected == 0 {
+	if m.db.First(&rt, "token = ?", in.Token.Token).RowsAffected == 0 {
 		return nil, errors.New("Token not found.")
 	}
 
 	// Find the user.
 	var u models.User
-	tx = m.db.First(&u, "id = ?", rt.UserID)
-	if tx.RowsAffected == 0 {
+	if m.db.First(&u, "id = ?", rt.UserID).RowsAffected == 0 {
 		return nil, errors.New("User not found.")
 	}
 
@@ -217,13 +207,13 @@ func (m *usersServer) ChangePassword(ctx context.Context, in *proto.ChangePasswo
 	}
 
 	u.Password = string(bytes)
-	if tx = m.db.Save(u); tx.RowsAffected == 0 {
+	if m.db.Save(u).RowsAffected == 0 {
 		return nil, errors.New("Failed to update password.")
 	}
 
 	// Expire current token.
 	rt.Expires = time.Now().UnixNano()
-	if tx = m.db.Save(&rt); tx.RowsAffected == 0 {
+	if m.db.Save(&rt).RowsAffected == 0 {
 		return nil, errors.New("Failed to update password.")
 	}
 
@@ -239,7 +229,7 @@ func (m *usersServer) ListRoles(ctx context.Context, in *proto.ListRolesRequest)
 
 	// Get all of the available roles.
 	var roles []models.Role
-	if tx := m.db.Find(&roles); tx.RowsAffected == 0 {
+	if m.db.Find(&roles).RowsAffected == 0 {
 		return nil, errors.New("Failed to find roles.")
 	}
 
@@ -262,14 +252,14 @@ func (m *usersServer) SetRoles(ctx context.Context, in *proto.SetRolesRequest) (
 
 	// Find the user.
 	var u models.User
-	if tx := m.db.First(&u, "id = ?", in.User.Id); tx.RowsAffected == 0 {
+	if m.db.First(&u, "id = ?", in.User.Id).RowsAffected == 0 {
 		return nil, errors.New("User not found.")
 	}
 
 	// Add the roles.
 	var r models.Role
 	for _, x := range in.Roles {
-		if tx := m.db.First(&r, "id = ?", x.Id); tx.RowsAffected != 0 {
+		if m.db.First(&r, "id = ?", x.Id).RowsAffected != 0 {
 			u.Roles = append(u.Roles, &r)
 		}
 	}