Spring Data - ignore parameter if it has a null value

Question

I want to have a spring data repository interface that takes two parameters. Is there a way to make it have the following behaviour?

MyObject findByParameter         


        

Answer 1

I am not sure if its possible using Repo as a separate class but you can use StringBuilder append query with option parameter. This will definitely work

 StringBuilder queryBuilder = new StringBuilder();
    queryBuilder.append("select p.name from personDemographic p "); 
    Boolean flag = true;
    if(parameterOne != null){
      if(flag){
          queryBuilder.append("where condition...");
            flag=false;
        } 
      }
    if(parameterOne != null){
    if(flag){
     queryBuilder.append("where condition...");
     flag = false;
    }else{
      queryBuilder.append("and condition...");
    }
   Query query = entityManager.createQuery(queryBuilder.toString());