EzyDatabase Default Functions

EzyDatabase provides a list of functions:

#	Function	Description
1	save	Save one or an array or a list of entities
2	findAll	Find all entities or a list of entities by skip an limit
3	findById	Find an entity by id
4	findByIdOptional	Find an entity by id and return an optional
5	findListByIds	Find a list of entities by a list of ids
6	findByField	Find an entity by field's name and field's value
7	findByFieldOptional	Find an entity by field's name and field's value and return an optional
8	findListByField	Find a list of entities by field's name and field's value
9	containsById	Check contains an entity or not by id
10	containsByField	Check contains an entity by field's name and field's value and return an optional
11	count	Count all entities
12	deleteAll	Delete all entities
13	delete	Delete an entity by id
14	deleteByIds	Delete a list of entities by ids

1. Save

You can save one or multi entities like this:

// save one book
bookRepository.save(book);

// save an array of books
bookRepository.save(book1, book2);

// save a list of books
bookRepository.save(bookList);

2. FindAll

You can find all entities like this:

 // find all books
List<Book> allBooks = bookRepository.findAll();

// skip 10 first books and take 10 books
List<Book> allBooks = bookRepository.findAll(10, 10);

3. FindById

You can find a entity by id like this:

Book book = bookRepository.findById(bookId);

4. FindByIdOptional

If you don't want to check null, you can find an entity by id an return an Optional like this:

Optional<Book> bookOptional = bookRepository.findByIdOptional(bookId);

5. FindListByIds

You can find a list of entities by a collection of ids like this:

List<Book> books = bookRepository.findListByIds(ids);

6. FindByField

You can find an entity by a field name and value like this:

Book book = bookRepository.findByField("name", "bookName");

7. FindByFieldOptional

If you don't want to check null, you can find an entity by a field name and value an return an Optional like this:

Optional<Book> bookOptional = bookRepository.findByFieldOptional("name", "bookName");

8. FindListByField

You can find a list of entities by a field name and value like this:

// find all books have the field value
List<Book> books = bookRepository.findListByField(
    "name",
    "bookName"
);

// find books have the field value, skip 10 first books and take 10 books
List<Book> books = bookRepository.findListByField(
    "name",
    "bookName",
    10,
    10
);

9. ContainsById

You can check an entity exists or not by id like this:

boolean isBookExisting = bookRepository.containsById(bookId);

10. ContainsByField

You can check an entity exists or not by a field name and value like this:

boolean isBookExisting = bookRepository.containsByField("name", "bookName");

11. Count

You can count all entities like this:

long bookCount = bookRepository.count();

12. DeleteAll

You can delete all entities like this:

bookRepository.deleteAll();

13. Delete

You can delete an entity by an id like this:

bookRepository.delete(bookId);

14. DeleteByIds

You can delete a list of entities that have id in a id list like this:

bookRepository.deleteByIds(bookIds);

Examples

Book management with MongoDB: an example for mongodb
Book management with JPA: an example for JPA and MySQL