Nestjs apply function to each controller function/routes after validation has done

Question

my controller:

    @Post('route1')
    @HttpCode(202)
    fun1(@Body() req: reqModel) {
        this.service1.findAll()  
        //do smth
        return true;
    }

    @Post('route2')
    @HttpCode(202)
    fun2(@Body() req: reqModel) {
        this.service1.findAll()  
        //do smth
        return true;
    }

I am trying to achieve the following mechanism:

1- validation has passed because I have model and class-validator in the models

2- now I want to call a service to get some data in each function in this controller this service check smth and then throw an exception or return true

I tried to use Guard @UseGuards(guradclass) but the guards works before the class validator

how can I achieve that

Answer 1

The execution order is the following if that can help you

• Middleware
• Guards
• Interceptors (before the stream is manipulated)
• Pipes
• Interceptors (after the stream is manipulated)
• Exception filters (if any exception is caught)