Первый прототип с основными возможностями

ent/schema/link.go

@@ -0,0 +1,44 @@
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+	"github.com/google/uuid"
+)
+
+// URL holds the schema definition for the URL entity.
+type Link struct {
+	ent.Schema
+}
+
+// Fields of the URL.
+func (Link) Fields() []ent.Field {
+	return []ent.Field{
+		field.UUID("id", uuid.UUID{}).
+			Default(uuid.New).
+			Unique().
+			Immutable(),
+		field.String("key").
+			Unique(),
+		field.String("original_url").
+			NotEmpty(),
+	}
+}
+
+func (Link) Indexes() []ent.Index {
+	return []ent.Index{
+		index.Fields("key").
+			Unique(),
+	}
+}
+
+// Edges of the URL.
+func (Link) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.From("owner", User.Type).
+			Required().
+			Ref("links"),
+	}
+}

ent/schema/user.go

@@ -0,0 +1,33 @@
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"github.com/google/uuid"
+)
+
+// User holds the schema definition for the User entity.
+type User struct {
+	ent.Schema
+}
+
+// Fields of the User.
+func (User) Fields() []ent.Field {
+	return []ent.Field{
+		field.UUID("id", uuid.UUID{}).
+			Default(uuid.New).
+			Unique().
+			Immutable(),
+		field.Int64("telegram_id").
+			Immutable().
+			Unique(),
+	}
+}
+
+// Edges of the User.
+func (User) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.To("links", Link.Type),
+	}
+}