When should I call SaveChangesAsync?

But fundamentally, an async call is about much more than that. The idea here is that if there is other work you can do (on the server) while the Save operation is in progress, then you should use SaveChangesAsync . Do not use “await”. Just call SaveChangesAsync , and then continue to do other stuff in parallel.

What does Dbcontext Savechanges return?

Returns. The number of state entries written to the underlying database. This can include state entries for entities and/or relationships.

What is EntityValidationErrors?

EntityValidationErrors is a collection which represents the entities which couldn’t be validated successfully, and the inner collection ValidationErrors per entity is a list of errors on property level. These validation messages are usually helpful enough to find the source of the problem.

Is SaveChangesAsync a transaction?

In all versions of Entity Framework, whenever you execute SaveChanges() to insert, update or delete on the database the framework will wrap that operation in a transaction. This transaction lasts only long enough to execute the operation and then completes.

What is FirstOrDefaultAsync?

FirstOrDefaultAsync(IQueryable) Asynchronously returns the first element of a sequence, or a default value if the sequence contains no elements.

What is SaveChanges?

SaveChanges() Saves all changes made in this context to the database. This method will automatically call DetectChanges() to discover any changes to entity instances before saving to the underlying database.

How does spring boot handle validation errors?

How should validations be handled?

1. Provide a clear message indicating what went wrong. Tell the user what was wrong in the input.
2. Send back proper response code. Usually in case of validation errors, we use HTTP Status 400 (BAD_REQUEST).
3. Don’t send sensitive information back in the response.

How do you solve validation failed for one or more entities?

Error: Validation failed for one or more entities. See ‘EntityValidationErrors’ property for more details. solution: correct your Data Model according to your database SET fieldNames or length.

Which is better EF or Dapper and why?

Dapper is literally much faster than Entity Framework Core considering the fact that there are no bells and whistles in Dapper. It is a straight forward Micro ORM that has minimal features as well. It is always up to the developer to choose between these 2 Awesome Data Access Technologies.

Should I use Entity Framework?

Conclusion. EF should be considered a great ORM framework which allows faster development, easier and quicker operations to the DB, as long as you are careful and know how it works in order to avoid certain mistakes and create performance problems.

What is AsQueryable?

AsQueryable() in C# AsQueryable() method is used to get an IQueryable reference. Let us see an example to find sum of integer values. Firstly, set an integer array. var arr = new int[] { 100, 200, 300, 400 };

What is ConfigureAwait false?

ConfigureAwait(false) involves a task that’s already completed by the time it’s awaited (which is actually incredibly common), then the ConfigureAwait(false) will be meaningless, as the thread continues to execute code in the method after this and still in the same context that was there previously.

What is DbContextTransaction?

Wraps access to the transaction object on the underlying store connection and ensures that the Entity Framework executes commands on the database within the context of that transaction. An instance of this class is retrieved by calling BeginTransaction() on the DbContextDatabase object.

How do I validate a REST API in Spring boot?

Let’s create a step-by-step example to demonstrate how to validate the Spring boot REST API request using Hibernate validator.

1. Create Spring boot application in STS.
2. Maven Dependencies.
3. Create User Class.
4. Configure Database.
5. Create UserRepository.
6. Create UserService Class.
7. Create UserController Class.
8. Create ValidationHandler.

What is the fastest ORM?

RepoDb remains as the most-fastest and most-efficient ORM in .

https://www.youtube.com/watch?v=6r-vg2Z8sGM