Out of these, I would say #3 is actually the worst, because “CRUD” on its own is not a use case at all; you always CRUD something. Don’t confuse use case <<extend>> with class inheritance. Option #2 is not very good either, because running through a “manage user” use case does not mean you perform … Read more
If you’re able to upgrade to Postgresql 9.5, the jsonb_set command is available, as others have mentioned. In each of the following SQL statements, I’ve omitted the where clause for brevity; obviously, you’d want to add that back. Update name: UPDATE test SET data = jsonb_set(data, ‘{name}’, ‘”my-other-name”‘); Replace the tags (as oppose to adding … Read more
EF calls CreateWebHostBuilder or BuildWebHost without running Main. So Iconfiguration is null. Create new class which inherited from IDesignTimeDbContextFactory . public class YourDbContext : DbContext { //Dbcontext implementation } public class YourDbContextFactory : IDesignTimeDbContextFactory<YourDbContext> { public YourDbContext CreateDbContext(string[] args) { var optionsBuilder = new DbContextOptionsBuilder<YourDbContext>(); optionsBuilder.UseSqlServer(“your connection string”); return new YourDbContext(optionsBuilder.Options); } } You are … Read more
Here is an example interface: public interface GenericDao<T, PK extends Serializable> { T create(T t); T read(PK id); T update(T t); void delete(T t); } And an implementation: public class GenericDaoJpaImpl<T, PK extends Serializable> implements GenericDao<T, PK> { protected Class<T> entityClass; @PersistenceContext protected EntityManager entityManager; public GenericDaoJpaImpl() { ParameterizedType genericSuperclass = (ParameterizedType) getClass() .getGenericSuperclass(); this.entityClass … Read more
I don’t think that there’s really anyone who enjoys doing CRUD (well at least anyone sane). It’s the most tedious part of web programming. My advice is to find or write a framework to automate this for you. evolutility django admin panel and django forms However, if that’s the majority of your work, you definitely … Read more
So you get a consistent view of the database. Imagine you have two tables that link to each other, but for some reason you do 2 selects… in pseuodocode: myRows = query(SELECT * FROM A) moreRows = query(SELECT * FROM B WHERE a_id IN myRows[id]) If between the two queries, someone changes B to delete … Read more
Spring Roo seems to be exactly what you’re looking for: CRUD code generation, spits out pure Java code that can be made tun run entirely independant from the framework.
I was recently looking for a nice solution to this without adding React-Bootstrap to my project (as Bootstrap 4 is about to be released). This is my solution: https://jsfiddle.net/16j1se1q/1/ let Modal = React.createClass({ componentDidMount(){ $(this.getDOMNode()).modal(‘show’); $(this.getDOMNode()).on(‘hidden.bs.modal’, this.props.handleHideModal); }, render(){ return ( <div className=”modal fade”> <div className=”modal-dialog”> <div className=”modal-content”> <div className=”modal-header”> <button type=”button” className=”close” data-dismiss=”modal” aria-label=”Close”><span … Read more
With replaceOne() you can only replace the entire document, while updateOne() allows for updating fields. Since replaceOne() replaces the entire document – fields in the old document not contained in the new will be lost. With updateOne() new fields can be added without losing the fields in the old document. For example if you have … Read more