Collections were an existing concept in FormKit but didn't allow nesting. You can now do infinite nesting:
```gjs
<Form
@data={{hash
foo=(array
(hash bar=(array (hash baz=1))) (hash bar=(array (hash baz=2)))
)
}}
as |form|
>
<form.Collection @name="foo" as |parent parentIndex|>
<parent.Collection @name="bar" as |child childIndex|>
<child.Field @name="baz" @title="Baz" as |field|>
<field.Input />
</child.Field>
</parent.Collection>
</form.Collection>
</Form>
```
On top of this a new component has been added: `Object`. It allows you to represent objects in your form data. Collections are basically handling arrays, and Objects are objects.
This is useful if you form data has this shape for example:
```javascript
{ foo: { bar: 1, baz: 2 } }
```
This can now be mapped in your form using this syntax:
```gjs
<Form @data={{hash foo=(hash bar=1 baz=2)}} as |form|>
<form.Object @name="foo" as |object name|>
<object.Field @name={{name}} @title={{name}} as |field|>
<field.Input />
</object.Field>
</form.Object>
</Form>
```
Objects accept nested collections and nested objects. Just like Collections.
A small addition has also been made to `Collection`, they now support a custom `@tagName`, it's useful if each item of your collection is the row of a table for example.
Form Kit is our new form library/framework for unifying the way forms look across Discourse. The admin config area for the /about page is a new form that isn't currently used, so it makes sense for it to be one of the first forms to be migrated to Form Kit to test the library.
Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>
- removes unused css code
- improves password control sizing
- adds more spacing between collection items
- correct a typo in collection class
---------
Co-authored-by: chapoi <101828855+chapoi@users.noreply.github.com>
This PR introduces FormKit, a component-based form library designed to simplify form creation and management. This library provides a single `Form` component, various field components, controls, validation mechanisms, and customization options. Additionally, it includes helpers to facilitate testing and writing specifications for forms.
1. **Form Component**:
- The main component that encapsulates form logic and structure.
- Yields various utilities like `Field`, `Submit`, `Alert`, etc.
**Example Usage**:
```gjs
import Form from "discourse/form";
<template>
<Form as |form|>
<form.Field
@name="username"
@title="Username"
@validation="required"
as |field|
>
<field.Input />
</form.Field>
<form.Field @name="age" @title="Age" as |field|>
<field.Input @type="number" />
</form.Field>
<form.Submit />
</Form>
</template>
```
2. **Validation**:
- Built-in validation rules such as `required`, `number`, `length`, and `url`.
- Custom validation callbacks for more complex validation logic.
**Example Usage**:
```javascript
validateUsername(name, value, data, { addError }) {
if (data.bar / 2 === value) {
addError(name, "That's not how maths work.");
}
}
```
```hbs
<form.Field @name="username" @validate={{this.validateUsername}} />
```
3. **Customization**:
- Plugin outlets for extending form functionality.
- Styling capabilities through propagated attributes.
- Custom controls with properties provided by `form` and `field`.
**Example Usage**:
```hbs
<Form class="my-form" as |form|>
<form.Field class="my-field" as |field|>
<MyCustomControl id={{field.id}} @onChange={{field.set}} />
</form.Field>
</Form>
```
4. **Helpers for Testing**:
- Test assertions for form and field validation.
**Example usage**:
```javascript
assert.form().hasErrors("the form shows errors");
assert.form().field("foo").hasValue("bar", "user has set the value");
```
- Helper for interacting with he form
**Example usage**:
```javascript
await formKit().field("foo").fillIn("bar");
```
5. **Page Object for System Specs**:
- Page objects for interacting with forms in system specs.
- Methods for submitting forms, checking alerts, and interacting with fields.
**Example Usage**:
```ruby
form = PageObjects::Components::FormKit.new(".my-form")
form.submit
expect(form).to have_an_alert("message")
```
**Field Interactions**:
```ruby
field = form.field("foo")
expect(field).to have_value("bar")
field.fill_in("bar")
```
6. **Collections handling**:
- A specific component to handle array of objects
**Example Usage**:
```gjs
<Form @data={{hash foo=(array (hash bar=1) (hash bar=2))}} as |form|>
<form.Collection @name="foo" as |collection|>
<collection.Field @name="bar" @title="Bar" as |field|>
<field.Input />
</collection.Field>
</form.Collection>
</Form>
```
