CRUD operations

To be able to perform CRUD operations with our data, we have to implement some code. We will make the necessary changes and introduce some new classes. What we will present to you now is a standard for every Spring application that manipulates the data stored in the relational database.

Create a package named repository with the NoteRepository interfaces as follows:

package com.journaler.api.repository 
 
import com.journaler.api.data.Note 
import org.springframework.data.repository.CrudRepository 
 
/** 
 * String is the type for ID we use. 
 */ 
interface NoteRepository : CrudRepository<Note, String> 
 
TodoRepository: 
package com.journaler.api.repository 
 
import com.journaler.api.data.Todo 
import org.springframework.data.repository.CrudRepository 
 
/** 
 * String is the type for ID we use. 
 */ 
interface TodoRepository : CrudRepository<Todo, String> 

Both interfaces inherit CrudRepository. CrudRepository brings us the following functionalities:

• save(): Saving...