feat: Migrate customer module to DML (#10499)

packages/core/utils/src/dml/__tests__/entity-builder.spec.ts

@@ -6231,6 +6231,86 @@ describe("Entity builder", () => {
       })
     })
 
+    test("should define onDelete cascade on pivot entity when applying detach cascade", () => {
+      const teamUser = model.define("teamUser", {
+        id: model.number(),
+        user: model.belongsTo(() => user, { mappedBy: "teams" }),
+        team: model.belongsTo(() => team, { mappedBy: "users" }),
+      })
+      const user = model
+        .define("user", {
+          id: model.number(),
+          username: model.text(),
+          teams: model.manyToMany(() => team, {
+            pivotEntity: () => teamUser,
+          }),
+        })
+        .cascades({
+          detach: ["teams"],
+        })
+
+      const team = model
+        .define("team", {
+          id: model.number(),
+          name: model.text(),
+          users: model.manyToMany(() => user, {
+            pivotEntity: () => teamUser,
+          }),
+        })
+        .cascades({
+          detach: ["users"],
+        })
+
+      type CascadeDetach = Parameters<(typeof team)["cascades"]>[0]["detach"]
+
+      expectTypeOf<CascadeDetach>().toEqualTypeOf<"users"[] | undefined>()
+
+      const [, , TeamUserEntity] = toMikroOrmEntities([user, team, teamUser])
+
+      const teamUserMetadata =
+        MetadataStorage.getMetadataFromDecorator(TeamUserEntity)
+      expect(teamUserMetadata.properties).toEqual(
+        expect.objectContaining({
+          user_id: {
+            reference: "scalar",
+            type: "User",
+            columnType: "text",
+            fieldName: "user_id",
+            nullable: false,
+            name: "user_id",
+            getter: false,
+            setter: false,
+          },
+          user: {
+            name: "user",
+            reference: "m:1",
+            entity: "User",
+            nullable: false,
+            persist: false,
+            onDelete: "cascade",
+          },
+          team_id: {
+            reference: "scalar",
+            type: "Team",
+            columnType: "text",
+            fieldName: "team_id",
+            nullable: false,
+            name: "team_id",
+            getter: false,
+            setter: false,
+          },
+          team: {
+            name: "team",
+            reference: "m:1",
+            entity: "Team",
+            nullable: false,
+            persist: false,
+            onDelete: "cascade",
+          },
+        })
+      )
+    })
+
     test("throw error when unable to locate relationship via mappedBy", () => {
       const team = model.define("team", {
         id: model.number(),

packages/core/utils/src/dml/entity.ts

@@ -71,7 +71,7 @@ export class DmlEntity<
   schema: Schema
 
   readonly #tableName: string
-  #cascades: EntityCascades<string[]> = {}
+  #cascades: EntityCascades<string[], string[]> = {}
   #indexes: EntityIndex<Schema>[] = []
   #checks: CheckConstraint<Schema>[] = []
 
@@ -100,7 +100,7 @@ export class DmlEntity<
     name: InferDmlEntityNameFromConfig<TConfig>
     tableName: string
     schema: DMLSchema
-    cascades: EntityCascades<string[]>
+    cascades: EntityCascades<string[], string[]>
     indexes: EntityIndex<Schema>[]
     checks: CheckConstraint<Schema>[]
   } {
@@ -139,7 +139,8 @@ export class DmlEntity<
    */
   cascades(
     options: EntityCascades<
-      ExtractEntityRelations<Schema, "hasOne" | "hasOneWithFK" | "hasMany">
+      ExtractEntityRelations<Schema, "hasOne" | "hasOneWithFK" | "hasMany">,
+      ExtractEntityRelations<Schema, "manyToMany">
     >
   ) {
     const childToParentCascades = options.delete?.filter((relationship) => {

packages/core/utils/src/dml/helpers/entity-builder/define-relationship.ts

@@ -144,7 +144,7 @@ export function defineHasOneRelationship(
     any
   >,
   { relatedModelName }: { relatedModelName: string },
-  cascades: EntityCascades<string[]>
+  cascades: EntityCascades<string[], string[]>
 ) {
   const shouldRemoveRelated = !!cascades.delete?.includes(relationship.name)
   const { schema: relationSchema } = relatedEntity.parse()
@@ -179,7 +179,7 @@ export function defineHasOneWithFKRelationship(
   MikroORMEntity: EntityConstructor<any>,
   relationship: RelationshipMetadata,
   { relatedModelName }: { relatedModelName: string },
-  cascades: EntityCascades<string[]>
+  cascades: EntityCascades<string[], string[]>
 ) {
   const foreignKeyName = camelToSnakeCase(`${relationship.name}Id`)
   const shouldRemoveRelated = !!cascades.delete?.includes(relationship.name)
@@ -213,7 +213,7 @@ export function defineHasManyRelationship(
   MikroORMEntity: EntityConstructor<any>,
   relationship: RelationshipMetadata,
   { relatedModelName }: { relatedModelName: string },
-  cascades: EntityCascades<string[]>
+  cascades: EntityCascades<string[], string[]>
 ) {
   const shouldRemoveRelated = !!cascades.delete?.includes(relationship.name)
 
@@ -259,7 +259,7 @@ export function defineBelongsToRelationship(
    * define a onDelete: cascade when we are included in the delete
    * list of parent cascade.
    */
-  const shouldCascade = relationCascades.delete?.includes(mappedBy)
+  const shouldCascade = !!relationCascades.delete?.includes(mappedBy)
 
   /**
    * Ensure the mapped by is defined as relationship on the other side
@@ -337,6 +337,9 @@ export function defineBelongsToRelationship(
     DmlManyToMany.isManyToMany(otherSideRelation)
   ) {
     const foreignKeyName = camelToSnakeCase(`${relationship.name}Id`)
+    const detachCascade =
+      !!relationship.mappedBy &&
+      relationCascades.detach?.includes(relationship.mappedBy)
 
     if (DmlManyToMany.isManyToMany(otherSideRelation)) {
       Property({
@@ -350,6 +353,7 @@ export function defineBelongsToRelationship(
         entity: relatedModelName,
         nullable: relationship.nullable,
         persist: false,
+        onDelete: shouldCascade || detachCascade ? "cascade" : undefined,
       })(MikroORMEntity.prototype, relationship.name)
     } else {
       ManyToOne({
@@ -660,7 +664,7 @@ export function defineRelationship(
   MikroORMEntity: EntityConstructor<any>,
   entity: DmlEntity<any, any>,
   relationship: RelationshipMetadata,
-  cascades: EntityCascades<string[]>,
+  cascades: EntityCascades<string[], string[]>,
   context: Context
 ) {
   /**