feat: ERD 엔지니어링 툴 테이블/컬럼 이름 변경 기능 추가

packages/web/src/lib/erd.rename.test.ts

@@ -0,0 +1,39 @@
+import { describe, expect, it } from "vitest";
+import { ERDModel } from "./erd";
+
+describe("ERDModel renameTable ordering regression", () => {
+  it("maintains table order and updates FKs when renaming users to members", () => {
+    const model = new ERDModel();
+    model.addTable("users");
+    model.addColumn("users", { name: "id", type: "integer", isPrimaryKey: true });
+
+    model.addTable("posts");
+    model.addColumn("posts", { name: "id", type: "integer", isPrimaryKey: true });
+    model.addColumn("posts", { name: "user_id", type: "integer" });
+    model.addForeignKey("posts", {
+      columnName: "user_id",
+      referenceTable: "users",
+      referenceColumn: "id",
+    });
+
+    // Rename users to members
+    model.renameTable("users", "members");
+
+    // The order of tables should be [members, posts], not [posts, members]
+    const tables = model.getTables();
+    expect(tables.map(t => t.name)).toStrictEqual(["members", "posts"]);
+
+    // DDL should also generate members before posts and update REFERENCES
+    const ddl = model.generateDDL();
+    const expectedDdl = `CREATE TABLE members (
+  id integer PRIMARY KEY
+);
+
+CREATE TABLE posts (
+  id integer PRIMARY KEY,
+  user_id integer,
+  FOREIGN KEY (user_id) REFERENCES members(id)
+);`;
+    expect(ddl).toBe(expectedDdl);
+  });
+});

packages/web/src/lib/erd.test.ts

@@ -407,4 +407,67 @@ CREATE TABLE posts (
       );
     });
   });
+
+  describe("Renaming", () => {
+    beforeEach(() => {
+      model.addTable("users");
+      model.addColumn("users", { name: "id", type: "integer" });
+      model.addTable("posts");
+      model.addColumn("posts", { name: "id", type: "integer" });
+      model.addColumn("posts", { name: "user_id", type: "integer" });
+      model.addForeignKey("posts", {
+        columnName: "user_id",
+        referenceTable: "users",
+        referenceColumn: "id",
+      });
+    });
+
+    it("should rename table and update foreign keys", () => {
+      model.renameTable("users", "members");
+      expect(model.getTable("users")).toBeUndefined();
+      expect(model.getTable("members")?.name).toBe("members");
+      expect(model.getTable("posts")?.foreignKeys[0].referenceTable).toBe("members");
+    });
+
+    it("should throw when renaming non-existent table", () => {
+      expect(() => model.renameTable("non_existent", "members")).toThrowError(
+        "Table 'non_existent' does not exist."
+      );
+    });
+
+    it("should throw when renaming table to existing table", () => {
+      expect(() => model.renameTable("users", "posts")).toThrowError(
+        "Table 'posts' already exists."
+      );
+    });
+
+    it("should rename column and update foreign keys", () => {
+      model.renameColumn("users", "id", "member_id");
+      expect(model.getTable("users")?.columns[0].name).toBe("member_id");
+      expect(model.getTable("posts")?.foreignKeys[0].referenceColumn).toBe("member_id");
+
+      model.renameColumn("posts", "user_id", "member_id");
+      expect(model.getTable("posts")?.columns[1].name).toBe("member_id");
+      expect(model.getTable("posts")?.foreignKeys[0].columnName).toBe("member_id");
+    });
+
+    it("should throw when renaming column in non-existent table", () => {
+      expect(() => model.renameColumn("non_existent", "id", "new_id")).toThrowError(
+        "Table 'non_existent' does not exist."
+      );
+    });
+
+    it("should throw when renaming non-existent column", () => {
+      expect(() => model.renameColumn("users", "non_existent", "new_id")).toThrowError(
+        "Column 'non_existent' does not exist in table 'users'."
+      );
+    });
+
+    it("should throw when renaming column to existing column", () => {
+      model.addColumn("users", { name: "existing_col", type: "integer" });
+      expect(() => model.renameColumn("users", "id", "existing_col")).toThrowError(
+        "Column 'existing_col' already exists in table 'users'."
+      );
+    });
+  });
 });

packages/web/src/lib/erd.ts

@@ -204,6 +204,69 @@ export class ERDModel {
     table.foreignKeys.splice(fkIndex, 1);
   }
 
+  renameTable(oldName: string, newName: string): void {
+    assertSnakeCaseIdentifier("Table", oldName);
+    assertSnakeCaseIdentifier("Table", newName);
+
+    const table = this.tables.get(oldName);
+    if (!table) {
+      throw new Error(`Table '${oldName}' does not exist.`);
+    }
+    if (this.tables.has(newName)) {
+      throw new Error(`Table '${newName}' already exists.`);
+    }
+
+    table.name = newName;
+    const entries = Array.from(this.tables.entries());
+    this.tables = new Map(
+      entries.map(([key, val]) => (key === oldName ? [newName, val] : [key, val]))
+    );
+
+    for (const t of this.tables.values()) {
+      for (const fk of t.foreignKeys) {
+        if (fk.referenceTable === oldName) {
+          fk.referenceTable = newName;
+        }
+      }
+    }
+  }
+
+  renameColumn(tableName: string, oldColumnName: string, newColumnName: string): void {
+    assertSnakeCaseIdentifier("Table", tableName);
+    assertSnakeCaseIdentifier("Column", oldColumnName);
+    assertSnakeCaseIdentifier("Column", newColumnName);
+
+    const table = this.tables.get(tableName);
+    if (!table) {
+      throw new Error(`Table '${tableName}' does not exist.`);
+    }
+
+    const col = table.columns.find((c) => c.name === oldColumnName);
+    if (!col) {
+      throw new Error(`Column '${oldColumnName}' does not exist in table '${tableName}'.`);
+    }
+
+    if (table.columns.some((c) => c.name === newColumnName)) {
+      throw new Error(`Column '${newColumnName}' already exists in table '${tableName}'.`);
+    }
+
+    col.name = newColumnName;
+
+    for (const t of this.tables.values()) {
+      for (const fk of t.foreignKeys) {
+        if (fk.referenceTable === tableName && fk.referenceColumn === oldColumnName) {
+          fk.referenceColumn = newColumnName;
+        }
+      }
+    }
+
+    for (const fk of table.foreignKeys) {
+      if (fk.columnName === oldColumnName) {
+        fk.columnName = newColumnName;
+      }
+    }
+  }
+
   generateDDL(): string {
     let ddl = "";
     for (const table of this.tables.values()) {