CODEWITHSUNDEEP
c#validationasp.net-web-api2autofacfluentvalidation
jjczopek
jjczopek

Reputation: 3379

WebAPI 2 & Fluent validation - leverage RuleSet

I'm working on a Web API application, leveraging FluentValidation and AutoMapper and AutoFac. I have the basic setup, and everything is working as supposed. Validation is executed transparently for me, and in controller I can just check whether its valid or not:

    [Route("")]
    [HttpPost]
    public HttpResponseMessage PostDinnerList(DinnerListDTO newDinnerList)
    {
        if (!ModelState.IsValid)
        {
            return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
        }
        var dinnerList = _mapper.Map<DinnerList>(newDinnerList);
        dinnerList.Owner.Token = _userService.GetUserToken();
        dinnerList = _dinnerListRepository.InsertDinnerList(dinnerList);
        var newDinnerListDto = _mapper.Map<DinnerListDTO>(dinnerList);
        return Request.CreateResponse(newDinnerListDto);
    }

This is OK when I pass the DTO and save it into database. However I would like to leverage the same validator with ruleset to differentiate between when new entry is created and when it's edited as different rules kick in.

I saw that in MVC version of FluentValidation, CustomizeValidatorAttribute is available, and rulesets can be selected with it. There is nothing like that in WebAPI version.

I'm thinking how can I tackle the issue. Ideally I would like to have two actions: new/update, and use the same validator and just indicate which ruleset should be used.

Workarounds that come to my mind:

Please advise.

Upvotes: 1

Views: 500

Answers (1)

Omar.Alani
Omar.Alani

Reputation: 4130

  1. In case your entity for example has an auto generated Ids (identity), You can probably depend on the id of the DTO to check if your entity is new (no id set) or it is about to update (id will be set) and build your validation rules according to that using "When" or "Unless" methods.

  2. Other option is your DTO will have a state which describe the action that you want to perform, so Added, Updated, Deleted, and Unchanged, and building the validation rules around that using "When" or "Unless" methods.

Hope this helps.

Upvotes: 2

Related Questions