Can add a hook method?

[qibinlin]

Feature Request

Is your feature request related to a problem? Please describe.

how do i add a hook method? : Such as modified_field, validate_delete, validate_field,validate_write

Describe the solution you'd like

1, When inserting or updating an entity, the validate_write method is triggered ;
2,When the entity field value is modified, the modified_field and validate_field method is triggered ;
3.When the entity field value is modified, there is a method such as orig() that returns the original record value before modification.

Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

[github-actions]

Thank you for opening your first issue in the Canyon-SQL project!

[TheRustifyer]

Hello @qibinlin

There's no direct functionality like those hooks, but since most of the methods of the entities returns a wrapper Result<T, E>, (and the ones that makes inserts and updates for sure) you can apply any of the methods over the result wrapper to implement a similar functionality, for example, you can invoke .map(), and_then(), or() and pass the logic that you want to execute to the methods argument (typically a clousure).

For example, after inserting data with a canyon_entity instace, invoking the .insert() method, you'll obtain a Result<Pk, Err>, where Pk is just a placeholder for the same datatype that holds the primary_key annotation on your entity.

So, if you need something with that, you'll need to procedurally manipulate the Result with the methods provided in its API, or do a pattern matching for handling the Ok or Err variants.

Let us know if this helped you.

Cheers.