feat: Add a argument to determine whether to automatically create a table (#73)

* feat: Add a argument to determine whether to automatically create a table

Signed-off-by: terry-xuan-gao <[email protected]>

* feat: Add a argument to determine whether to automatically create a table

Signed-off-by: terry-xuan-gao <[email protected]>

* Update README.md

---------

Signed-off-by: terry-xuan-gao <[email protected]>
Co-authored-by: hsluoyz <[email protected]>

Author: terry-xuan-gao

README.md

@@ -59,13 +59,17 @@ async function myFunction() {
   // Initialize a Sequelize adapter and use it in a Node-Casbin enforcer:
   // The adapter can not automatically create database.
   // But the adapter will automatically and use the table named "casbin_rule".
+  // The second boolean argument: autoCreateTable determines whether the adapter will automatically create the "casbin_rule" table.
   // ORM should not create databases automatically.
-  const a = await SequelizeAdapter.newAdapter({
-    username: 'root',
-    password: '',
-    database: 'casbin',
-    dialect: 'mysql',
-  });
+  const a = await SequelizeAdapter.newAdapter(
+    {
+      username: 'root',
+      password: '',
+      database: 'casbin',
+      dialect: 'mysql',
+    },
+    true,
+  );
 
   const e = await casbin.newEnforcer('examples/rbac_model.conf', a);
 

src/adapter.ts

@@ -29,9 +29,11 @@ export class SequelizeAdapter implements Adapter {
   private readonly option: SequelizeAdapterOptions;
   private sequelize: Sequelize;
   private filtered = false;
+  private autoCreateTable = true;
 
-  constructor(option: SequelizeAdapterOptions) {
+  constructor(option: SequelizeAdapterOptions, autoCreateTable = true) {
     this.option = option;
+    this.autoCreateTable = autoCreateTable;
   }
 
   public isFiltered(): boolean {
@@ -47,9 +49,10 @@ export class SequelizeAdapter implements Adapter {
    * @param option sequelize connection option
    */
   public static async newAdapter(
-    option: SequelizeAdapterOptions
+    option: SequelizeAdapterOptions,
+    autoCreateTable?: boolean
   ): Promise<SequelizeAdapter> {
-    const a = new SequelizeAdapter(option);
+    const a = new SequelizeAdapter(option, autoCreateTable);
     await a.open();
 
     return a;
@@ -60,7 +63,9 @@ export class SequelizeAdapter implements Adapter {
     updateCasbinRule(this.option.tableName);
     await this.sequelize.authenticate();
     this.sequelize.addModels([CasbinRule]);
-    await this.createTable();
+    if (this.autoCreateTable) {
+      await this.createTable();
+    }
   }
 
   public async close(): Promise<void> {