readonly

Is it possible to make a Django model read only? No creating, updating etc. N.B. this question is different to: Make a Django model read-only? (this question allows creation of new records) Whole model as read-only (only concerns the Django admin interface - I'd like the model to be read only throughout the whole app) Override the save and delete methods for the model. How are you planning to add objects to your model? def save(self, *args, **kwargs): return def delete(self, *args, **kwargs): return Database Routers To take more precautions that your model is read-only, you can use the

I have the following class: class SampleClass { private ArrayList mMyList; SampleClass() { // Initialize mMyList } public ArrayList MyList { get { return mMyList;} } } I want users to be able to get mMyList which is why i exposed the "get" via a property however i don't want changes they make to the object (ie. MyList.Add(new Class());) to make its way back into my class. I guess i can return a copy of the object but that may be slow and i'm looking for a way that will provide a compile-time error informing the user that they shouldn't expect to be able to modify the returned value from the

I was attempting to answer someone elses question . And in doing so realised there was quite a bit of uncertainty in my mind about a few things. I'm hoping someone can provide feedback on the numbered points 1..4: Task: Conditionally make input field readonly Relevant section of HTML: <input type="text" placeholder="Club Name" #clubName> Add this to Typescript component. // class properties @ViewChild('clubName') inp:HTMLInputElement; // Could also use interface Element // conditionally set in some other methods of class inp.setAttribute('readonly', 'readonly'); inp.removeAttribute('readonly')

It's possible create a readonly database user at an Oracle Database? How? A user in an Oracle database only has the privileges you grant. So you can create a read-only user by simply not granting any other privileges. When you create a user CREATE USER ro_user IDENTIFIED BY ro_user DEFAULT TABLESPACE users TEMPORARY TABLESPACE temp; the user doesn't even have permission to log in to the database. You can grant that GRANT CREATE SESSION to ro_user and then you can go about granting whatever read privileges you want. For example, if you want RO_USER to be able to query SCHEMA_NAME.TABLE_NAME ,

I've got the extremely unlikely and original situation of wanting to return a readonly array from my property. So far I'm only aware of one way of doing it - through the System.Collections.ObjectModel.ReadOnlyCollection<T> . But that seems somehow awkward to me, not to mention that this class loses the ability to access array elements by their index ( added: whoops, I missed the indexer ). Is there no better way? Something that could make the array itself immutable? Jeff Yates Use ReadOnlyCollection<T> . It is read-only and, contrary to what you believe, it has an indexer. Arrays are not