Let’s say we have entities like this: @Entity @Table public class Parent { @Id private Long id; @OneToMany(mappedBy=”parent”, fetch = FetchType.EAGER) @Fetch(FetchMode.JOIN) private List<Child> child; //getter setters } @Entity @Table public class Child { @Id private Long id; @ManyToOne(fetch = FetchType.LAZY) private Parent parent; //getter setter } In the example above, when getting Parent entity, … Read more
Follow the following steps if you are using proxy server: Open Eclipse Window >> Android SDK Manager >> Option Input your proxy server and port. Hope this helps.
You can rely on Promises to execute them all before your then resolution. If you are used to jQuery, you can use jQuery Promises as well. With Promise.all you will enforce that every request is completed before continue with your code execution Promise.all([ fetch(“http://localhost:3000/items/get”), fetch(“http://localhost:3000/contactlist/get”), fetch(“http://localhost:3000/itemgroup/get”) ]).then(([items, contactlist, itemgroup]) => { ReactDOM.render( <Test items={items} contactlist={contactlist} … Read more
Working Solution Combining then with catch works. fetch(‘http://some-site.com/api/some.json’) .then(function(response) { // first then() if(response.ok) { return response.text(); } throw new Error(‘Something went wrong.’); }) .then(function(text) { // second then() console.log(‘Request successful’, text); }) .catch(function(error) { // catch console.log(‘Request failed’, error); }); Details fetch() returns a Promise containing a Response object. The Promise can become either … Read more
The new Linq provider does it a little differently: var customers = session.Query<Customer>().Fetch(c => c.Orders).ToList(); More here: http://mikehadlow.blogspot.com/2010/08/nhibernate-linq-eager-fetching.html
A predicate like NSPredicate *predicate = [NSPredicate predicateWithFormat:@”NOT (self IN %@)”, arrayOfExcludedObjects]; where the entity of the fetch request is the entity of objects in the array, should do what you want. This can, of course be combined with other clauses in a single predicate for a fetch request. In general, object comparisons (e.g self … Read more
Join is supposed to solve the n+1 problem. If you have 10 parents, each with 10 children, join will require one query and select will require 11 (one for the parents and one for the children of each parent). This may not be a big deal if the database is on the same server as … Read more
You’re returning the result of calling getResponse() from the useEffect function. If you return anything from useEffect, it has to be a function. Changing your code to this should fix it because you’re no longer returning anything from the useEffect function. useEffect(() => { getResponse(); }); The useEffect Cleanup Function If you return anything from … Read more
I solve the problem the following way (MySQL only) $q = $dbh->prepare(“DESCRIBE tablename”); $q->execute(); $table_fields = $q->fetchAll(PDO::FETCH_COLUMN);