Url query resolver for @Controller methods

I’m submitting a…

[ ] Regression 
[ ] Bug report
[x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

With the current implementation, there is no easy way to filter data through url query string.

Expected behavior

Empowering Controllers the ability to resolve url querys & building an apropiate SelectQuery using TypeORM QueryBuilder.

@Controller('foo')
export class FooController {

  @Get()
  @Filterable()
  filter(@ORMQuery() query //A SelectQuery built) {
    // Call Provider here. In order to simplify the example I'll call Repository directly
    return this.fooRepository.find(query);
  }
}

Given a query string like:

foo/?name=foo&surname__contains=fake&fk__related_prop=2&page=2

It will return the following SelectQuery:

const filterQuery = await connection
    .getRepository(Foo)
    .createQueryBuilder('foo')
    .where('foo.name = foo')
    .andWhere('surname like fake')
    .innerJoinAndSelect(Foo, 'foo', 'foo.related_prop = 2')
    .take(25)
    .skip(25 * 2 - 1)

Update 02/27/2019

I found this library whose owner is @bashleigh that resolves pagination & limit problem (and filterParameters, right). Could it be interesting to implement proposed feature in this library? Parsing query string and transform it like TypeORM findOptions

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

A very common use case is to be able to filter content for an endpoint using the url query format.

Environment

Nest version: @next

Others:

[rjlopezdev]

Update:

I publish this package that allows transform Express req.query into TypeORM queries. For now, doesn’t allow join/nested props queries, but it will coming soon 😃

If you consider interesting adding it as a nestjs/typeorm feature, I could integrate on it maybe like:

• Writing a ORMQuery decorator, used like:

import { ORMQuery } from 'nestjs/typeorm';

@Controller('foo')
export class FooController {

  @Get()
  filter(@ORMQuery() query) {
    return this.fooService.find(query);
  }
}

[xmlking]

@rjlopezdev please also check some similar work here https://github.com/nestjsx/crud