Handle user creation upon registration.

ent/runtime.go

@@ -14,6 +14,14 @@ import (
 func init() {
 	userFields := schema.User{}.Fields()
 	_ = userFields
+	// userDescUsername is the schema descriptor for username field.
+	userDescUsername := userFields[0].Descriptor()
+	// user.UsernameValidator is a validator for the "username" field. It is called by the builders before save.
+	user.UsernameValidator = userDescUsername.Validators[0].(func(string) error)
+	// userDescPassword is the schema descriptor for password field.
+	userDescPassword := userFields[1].Descriptor()
+	// user.PasswordValidator is a validator for the "password" field. It is called by the builders before save.
+	user.PasswordValidator = userDescPassword.Validators[0].(func(string) error)
 	// userDescCreatedAt is the schema descriptor for created_at field.
 	userDescCreatedAt := userFields[2].Descriptor()
 	// user.DefaultCreatedAt holds the default value on creation for the created_at field.

ent/schema/user.go

@@ -16,9 +16,11 @@ type User struct {
 func (User) Fields() []ent.Field {
 	return []ent.Field{
 		field.String("username").
-			Unique(),
+			Unique().
+			NotEmpty(),
 		field.String("password").
-			Sensitive(),
+			Sensitive().
+			NotEmpty(),
 		field.Time("created_at").
 			Default(time.Now).
 			Immutable(),

ent/user/user.go

@@ -40,6 +40,10 @@ func ValidColumn(column string) bool {
 }
 
 var (
+	// UsernameValidator is a validator for the "username" field. It is called by the builders before save.
+	UsernameValidator func(string) error
+	// PasswordValidator is a validator for the "password" field. It is called by the builders before save.
+	PasswordValidator func(string) error
 	// DefaultCreatedAt holds the default value on creation for the "created_at" field.
 	DefaultCreatedAt func() time.Time
 )

ent/user_create.go

@@ -128,9 +128,19 @@ func (uc *UserCreate) check() error {
 	if _, ok := uc.mutation.Username(); !ok {
 		return &ValidationError{Name: "username", err: errors.New(`ent: missing required field "username"`)}
 	}
+	if v, ok := uc.mutation.Username(); ok {
+		if err := user.UsernameValidator(v); err != nil {
+			return &ValidationError{Name: "username", err: fmt.Errorf(`ent: validator failed for field "username": %w`, err)}
+		}
+	}
 	if _, ok := uc.mutation.Password(); !ok {
 		return &ValidationError{Name: "password", err: errors.New(`ent: missing required field "password"`)}
 	}
+	if v, ok := uc.mutation.Password(); ok {
+		if err := user.PasswordValidator(v); err != nil {
+			return &ValidationError{Name: "password", err: fmt.Errorf(`ent: validator failed for field "password": %w`, err)}
+		}
+	}
 	if _, ok := uc.mutation.CreatedAt(); !ok {
 		return &ValidationError{Name: "created_at", err: errors.New(`ent: missing required field "created_at"`)}
 	}

ent/user_update.go

@@ -50,6 +50,9 @@ func (uu *UserUpdate) Save(ctx context.Context) (int, error) {
 		affected int
 	)
 	if len(uu.hooks) == 0 {
+		if err = uu.check(); err != nil {
+			return 0, err
+		}
 		affected, err = uu.sqlSave(ctx)
 	} else {
 		var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
@@ -57,6 +60,9 @@ func (uu *UserUpdate) Save(ctx context.Context) (int, error) {
 			if !ok {
 				return nil, fmt.Errorf("unexpected mutation type %T", m)
 			}
+			if err = uu.check(); err != nil {
+				return 0, err
+			}
 			uu.mutation = mutation
 			affected, err = uu.sqlSave(ctx)
 			mutation.done = true
@@ -97,6 +103,21 @@ func (uu *UserUpdate) ExecX(ctx context.Context) {
 	}
 }
 
+// check runs all checks and user-defined validators on the builder.
+func (uu *UserUpdate) check() error {
+	if v, ok := uu.mutation.Username(); ok {
+		if err := user.UsernameValidator(v); err != nil {
+			return &ValidationError{Name: "username", err: fmt.Errorf("ent: validator failed for field \"username\": %w", err)}
+		}
+	}
+	if v, ok := uu.mutation.Password(); ok {
+		if err := user.PasswordValidator(v); err != nil {
+			return &ValidationError{Name: "password", err: fmt.Errorf("ent: validator failed for field \"password\": %w", err)}
+		}
+	}
+	return nil
+}
+
 func (uu *UserUpdate) sqlSave(ctx context.Context) (n int, err error) {
 	_spec := &sqlgraph.UpdateSpec{
 		Node: &sqlgraph.NodeSpec{
@@ -179,6 +200,9 @@ func (uuo *UserUpdateOne) Save(ctx context.Context) (*User, error) {
 		node *User
 	)
 	if len(uuo.hooks) == 0 {
+		if err = uuo.check(); err != nil {
+			return nil, err
+		}
 		node, err = uuo.sqlSave(ctx)
 	} else {
 		var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
@@ -186,6 +210,9 @@ func (uuo *UserUpdateOne) Save(ctx context.Context) (*User, error) {
 			if !ok {
 				return nil, fmt.Errorf("unexpected mutation type %T", m)
 			}
+			if err = uuo.check(); err != nil {
+				return nil, err
+			}
 			uuo.mutation = mutation
 			node, err = uuo.sqlSave(ctx)
 			mutation.done = true
@@ -226,6 +253,21 @@ func (uuo *UserUpdateOne) ExecX(ctx context.Context) {
 	}
 }
 
+// check runs all checks and user-defined validators on the builder.
+func (uuo *UserUpdateOne) check() error {
+	if v, ok := uuo.mutation.Username(); ok {
+		if err := user.UsernameValidator(v); err != nil {
+			return &ValidationError{Name: "username", err: fmt.Errorf("ent: validator failed for field \"username\": %w", err)}
+		}
+	}
+	if v, ok := uuo.mutation.Password(); ok {
+		if err := user.PasswordValidator(v); err != nil {
+			return &ValidationError{Name: "password", err: fmt.Errorf("ent: validator failed for field \"password\": %w", err)}
+		}
+	}
+	return nil
+}
+
 func (uuo *UserUpdateOne) sqlSave(ctx context.Context) (_node *User, err error) {
 	_spec := &sqlgraph.UpdateSpec{
 		Node: &sqlgraph.NodeSpec{