db: init memo and memo relation schema

Signed-off-by: Wei Zhang <[email protected]>

ent/schema/memo.go

@@ -0,0 +1,34 @@
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+)
+
+// Memo holds the schema definition for the Memo entity.
+type Memo struct {
+	ent.Schema
+}
+
+// Fields of the Memo.
+func (Memo) Fields() []ent.Field {
+	return []ent.Field{
+		field.Int("id").Positive(),
+		field.String("resource_name").MaxLen(256).NotEmpty().Unique(),
+		field.Int("creator_id").Positive(),
+		field.Time("created_ts"),
+		field.Time("updated_ts"),
+		field.String("row_status").MaxLen(256).NotEmpty(),
+		field.Text("content").Default(""),
+		field.String("visibility").MaxLen(256).NotEmpty(),
+	}
+}
+
+// Edges of the Memo.
+func (Memo) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.To("related_memo", Memo.Type).
+			Through("memo_relation", MemoRelation.Type),
+	}
+}

ent/schema/memorelation.go

@@ -0,0 +1,35 @@
+package schema
+
+import (
+	"entgo.io/ent"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+)
+
+// MemoRelation holds the schema definition for the MemoRelation entity.
+type MemoRelation struct {
+	ent.Schema
+}
+
+// Fields of the MemoRelation.
+func (MemoRelation) Fields() []ent.Field {
+	return []ent.Field{
+		field.String("type"),
+		field.Int("memo_id"),
+		field.Int("related_memo_id"),
+	}
+}
+
+// Edges of the MemoRelation.
+func (MemoRelation) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.To("memo", Memo.Type).
+			Required().
+			Unique().
+			Field("memo_id"),
+		edge.To("related_memo", Memo.Type).
+			Required().
+			Unique().
+			Field("related_memo_id"),
+	}
+}