User:Admin

Create two working minimalistic LiveViews.

One is named SendView and the other is ReceiveView .

The SendView consist of a single form field to send data to RecieveView. ReceiveView contains code to renders SendView data to its page.

To understand web socket configuration we will:

1. Create a one way data connection between the two LiveViews and explain clearly the relationship between

2. Edit the code to create a two-way connection between both live views.

3. Combine both LiveViews into one live view to send and receive.

4. Write code to store realtime chat content to a database.

PUB SUB

Before we begin, I will share three small pieces of code with you. These are "Elixir Blocks" for what we will build. It is not important that you understand them yet.

AppWeb.Endpoint.subscribe()

AppWeb.Endpoint.broadcast()

def handle_info(msg, socket) do
    {:noreply, assign(socket)}
end

def handle_event(msg, params, socket) do
    {:noreply, socket}
end

• How to Create Database Seed Data.
• How to Use Generators in a Real World Project
• How to Work with Database Data via Basic Commands and Custom Change sets.
• How to Render Database Data to LiveView (via Context Commands).
• How to Create a Chat using PubSub.
• How to Create Event Handlers in LiveView
• How to Create a Dynamic Route from Scratch.
• How to Use Elixirs Template language
• How to Work with Modal
• How to Use CSS From Scratch (Without bundler)
• How to use JS hooks

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https://elixirschool.com/blog/live-view-live-component

Note:

mix phx.gen.html Alerts Alert alerts title:string content:text enabled:boolean

defmodule AppWeb.PageLive do
   use AppWeb, :live_view  
   alias App.Alerts
   def mount(_params, _session, socket)  do
	 {:ok, assign(socket, alerts: Alerts.list_alerts())}  
   end

   def render(assigns) do
     ~H"""
        <%= for alert <- @alerts do %>
        	<%= if alert.enabled  do %>
              <div><%= alert.content%></div>
              <% end %>

        <% end %>

	 """ 
   end

end

#_____________________________

  def check_for_single_selection(data) do 

      list = App.Alerts.list_alerts()

      IO.inspect list

      result = Enum.filter(list, fn x -> x.enabled == true end)
      IO.inspect "WORK_____________________________"  
      IO.inspect result 
      IO.inspect "WORK_____________________________"

      data

  end

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Complex pattern matching https://www.youtube.com/watch?v=gCVWrM5BNVE

Genservers (and related, agent,task etc)

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ECTO

query = from "artists", select:[:name]

Verbose:

Ecto.Query.from("artists", select[:name])

Repo.all(query)

1. => [%{name: "Miles Davis"}, %{name: "Bill Evans"}]

Repo.to_sql(:all, query)