Vaadin Crud for Flow

Vaadin Crud for Flow is a UI component add-on for Vaadin which provides CRUD UI for any data backend.

License & Author

This Add-on is distributed under Vaadin Commercial License and Service Terms (VCL). For license terms, see linked text.

Vaadin Crud is written by Vaadin Ltd.

To purchase a license, visit http://vaadin.com/pricing

Installing

Add Crud to your project

<dependencies>
  <dependency>
    <groupId>com.vaadin</groupId>
    <artifactId>enhanced-crud-flow</artifactId>
    <version>${vaadin.crud.version}</version>
  </dependency>
</dependencies>

Using Vaadin Crud

Basic use

In the most basic use case, Vaadin Crud requires the class of items to be processed and an editor for the class.

Crud<Person> crud = new Crud<>(Person.class, createPersonEditor());
crud.setDataProvider(personDataProvider);

// Handle save and delete events.
crud.addSaveListener(e -> save(e.getItem()));
crud.addDeleteListener(e -> delete(e.getItem()));

// Set a footer text or component if desired.
crud.setFooter("Flight manifest for XX210");

Creating an editor

The editor's purpose is to manage the currently edited item and present a UI (e.g a form) for manipulating it. You need to provide a class implementing the CrudEditor interface when creating a new Crud. Vaadin Crud however ships with the BinderCrudEditor helper which binds form fields to a provided bean.

private CrudEditor<Person> createPersonEditor() {
    TextField firstName = new TextField("First name");
    TextField lastName = new TextField("Last name");
    FormLayout form = new FormLayout(firstName, lastName);

    Binder<Person> binder = new Binder<>(Person.class);
    binder.bind(firstName, Person::getFirstName, Person::setFirstName);
    binder.bind(lastName, Person::getLastName, Person::setLastName);

    return new BinderCrudEditor<>(binder, form);
}

Disabling grid filters

Crud supports custom grids by accepting a Grid as a constructor parameter; however, a built-in Grid implementation called CrudGrid is provided.

When no Grid is supplied to the Crud constructor, it uses this CrudGrid. CrudGrid allows the search filters which are normally at the top of each column to be enabled or disabled. Setting the enableDefaultFilters constructor parameter to false disables it.

CrudGrid<Person> grid = new CrudGrid<>(Person.class, false);
PersonEditor editor = new PersonEditor();

Crud<Person> crud = new Crud<>(Person.class, grid, editor);

Creating a data provider

CrudGrid<Person> for example expects a data provider of type DataProvider<Person, CrudFilter>. The CrudFilter provides information about the filters and sort orders the user has applied to the grid.

A sample data provider can be seen here.

Using a custom grid

As discussed above, Crud supports custom Grids. An important detail to pay attention to is that Crud listens to edit events from the grid to initiate editing (i.e opening the editor and populating the form).

The easiest way to setup a grid to fire this event when an item is clicked is to use a built-in helper to add an edit column to the grid.

Grid<Person> myGrid = new Grid<>();
Crud.addEditColumn(myGrid);

// Add other columns to the grid as desired.

Crud<Person> crud = new Crud<>(Person.class, grid, editor);

Setting up for development

Clone the project in GitHub (or fork it if you plan on contributing)

git clone git@github.com:vaadin-component-factory/enhanced-crud.git

To build and install the project into the local repository run

mvn install -DskipITs

in the root directory. -DskipITs will skip the integration tests, which require a TestBench license. If you want to run all tests as part of the build, run

mvn install

To compile and run demos locally execute

mvn compile
mvn -pl enhanced-crud-flow-demo -Pwar jetty:run