Using Dedicated Repository Method

In some cases, when the number of conditions or query variations is limited, it's reasonable to create dedicated methods in the repository that directly use the database client. This approach reduces the need for a large number of methods and simplifies the repository interface. Let's see how to create a dedicated repository method:

Creating a Dedicated Repository Method

Suppose we have a UserRepository responsible for interacting with the user data in the database. We want to create a method to find users by their age.

1. Define UserRepository Method:

import { Repository, RepositoryImpl, Result } from '@soapjs/soap';
import { User } from '../path/to/user';

/**
 * UserRepository class responsible for user data operations.
 */
class UserRepository extends RepositoryImpl<User> implements Repository<User> {
  /**
   * Find users by their age.
   * @param {number} age - The age of the users to find.
   * @returns {Promise<Result<User[]>>} - A Promise resolving to an array of users.
   */
  async findUsersByAge(age: number): Promise<Result<User[]>> {
    // Constructing SQL query to find users by age
    const query = `SELECT * FROM users WHERE age = ?`;

    // Executing query using database client
    return await this.context.collection.query(query, [age]);
  }
}

1. Using the Repository Method:

Now, let's see how to use this repository method to find users by their age:

import { UserRepository } from '../path/to/user-repository';

// Creating an instance of UserRepository
const userRepository = new UserRepository(databaseClient);

// Using the repository method to find users by age
const users = await userRepository.findUsersByAge(30);

Conclusion

Creating dedicated methods in the repository tailored to specific query needs can simplify the codebase and provide a more intuitive interface for interacting with the database. This approach is suitable when the number of query variations is limited, and there's a clear separation of concerns between the repository and the database client.