How to handle null value in realm.io?

问题

from what I see if the value is nil for a property it always throws exception. sometimes i cannot simply set a '' empty string as nil, so what's the solution in realm? thanks.

回答1:

Null is now fully supported.

OLD answer:

Supporting nil/NULL is on the roadmap. Until then there are two workarounds:

1. Add a separate property to indicate if your property is nil.

   @interface IntObject : RLMObject
   @property NSInteger myProp;
   @property boolean myPropIsNil;
   @end
   

2. Wrap your property in an object:

   Object properties (links), can be nil though. So if you need a nullable int property, for example, you can wrap it in a new Realm model, like this:

   @interface IntObject : RLMObject
   @property NSInteger myProp;
   @end
   

   Then anytime you want to have an optional "int" property in your models, you can write this:

   @interface MyModel : RLMObject
   @property IntObject *optionalMyProp;
   @end
   

来源：https://stackoverflow.com/questions/26458585/how-to-handle-null-value-in-realm-io