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JavaScript Using SQL ORMs with Node.js Performing CRUD Operations Delete a Record

15,783 Points

Alternate solution using Promises instead of async/await

Using Async await

    // Find a record
    const toyStory = await Movie.findByPk(1);

    // Delete a record
    await toyStory.destroy();

Using Promise (with catch clause)

   // Find and Delete a record 
   Movie.findByPk(5).then(result => result.destroy())
      .catch(()=>{console.log("An error occurred in destroying the record.")});

My (newbie) understanding is that async-await is newer and supersedes Promises, but it's good to be familiar with both. I noticed a key difference here is that with async-await -> when a Primary Key record doesn't exist in the database, the program will crash. However with Promises, the .catch() clause can prevent crashing.

1 Answer

Steven Parker
Steven Parker
218,692 Points

The async/await syntax is used with promises, it does not superseded them. But you're right about it being newer, promises were released first and required complicated chaining to achieve the same functionality that async/await now simplifies.