![phoenix liveview form phoenix liveview form](https://www.poeticoding.com/wp-content/uploads/2020/02/featured_image.jpg)
Any module that implements only function components will use this behaviour. Our function component uses the Phoenix.Component behaviour which we need to render HEEx templates. Then, we'll move on to the rating show component, followed by the rating form component.Ĭreate a file, lib/arcade_web/live/rating_live/index.ex, and key in the following component definition: We'll begin by implementing the RatingLive.Index function component.
#Phoenix liveview form series
By layering these components within the parent SurveyLive view, we compose a series of small, manageable pieces into one interactive feature - the user survey page.
#Phoenix liveview form code
In this way, we keep our code organized and easy to maintain because it adheres to the single responsibility principle - each component has one job to do. The parent live view is responsible for maintaining and updating that list. The rating index component will receive the list of game ratings to render from the parent live view. Meanwhile, SurveyLive will continue to be responsible for managing the overall state and appearance of the survey page. A live "rating form" component will handle rendering and managing a rating form. The responsibility for rendering rating details will be handled by a "rating show" function component. This component will iterate over the games and render the rating details if a user rating exists, or the rating form if it doesn't. We'll build a rating index component responsible for orchestrating the state of all the game ratings in our survey. With that basic understanding in place, we're ready to implement the ratings index function component. When using inline render/1 functions in your live views, or function components, you'll return HEEx templates with the ~H sigil. Any generated template files in your Phoenix app will be HEEx templates and end in the. HEEx is the default templating engine for Phoenix and LiveView.
![phoenix liveview form phoenix liveview form](https://res.cloudinary.com/dwvh1fhcg/image/upload/v1608748018/tutorials/bootstrap_tut_img_1.png)
Everything between the expressions is a template replacement. Just like EEx templates, HEEx will process template replacements within your HTML code. The HEEx templating engine is an extension of EEx.
![phoenix liveview form phoenix liveview form](https://res.cloudinary.com/dwvh1fhcg/image/upload/v1622546245/tutorials/Screenshot_2021-06-01_at_13.13.36.png)
heex extension that is implicitly rendered by a live view, or any markup rendered by a live view or component that is encapsulated in the ~H""", """ tags. With our plan in place, we're ready to start writing code.Ī HEEx template is any file ending in the. If they have completed some (or all) ratings, they will see those displayed and forms to submit ratings for the games they have not yet rated. If users haven't completed a game rating, they will see a list of forms to rate each game 1-5 stars. The ratings index component will iterate over the games and show a game rating if one by the current user exists, or a form for a new rating if not. This live view will render a child functional component, "ratings index". We'll begin with a parent live view that lives at the /survey route, ArcadeWeb.SurveyLive. Let's lay out what we'll build in a bit more detail. We'll focus on that second part of the survey - the game rating forms. In this post, we'll build out a "user survey" feature that asks the user to fill out some demographic info about themselves and then provide a rating for each of several games. A user can log in, select a game to play, and even invite friends to play games with them. Imagine that you're responsible for a Phoenix web app, Arcade, that provides in-browser games to users. See the module documentation for examples of using this function.The Feature: Compose a User Survey UI for a Phoenix LiveView Appīefore we dive into writing any actual code, let's talk about the feature we'll build. Generates a form tag with a form builder and an anonymous function. Imagine you have the following action in your controller: def new ( conn, _params ) do changeset = User. Use Ecto.Changeset, which integrates nicely with Phoenix The entry point for defining forms in Phoenix is with We will explore all three scenarios below. Outside of a form - when the functions are used directly, With limited data - when a form is created withoutĪn underlying data layer. With changeset data - when information to populate The functions in this module can be used in three