使用PETAL(Phoenix、Elixir、TailwindCSS、AlpineJS、LiveView)技术栈构建一个简化版的Instagram Web应用程序
在第 1 部分中，我们已完成所有设置并准备好基本布局，让我们开始处理用户设置。您可以赶上Instagram 克隆 GitHub Repo。
让我们首先创建路由，打开lib/instagram_clone_web/router.ex并在范围下添加以下 2 条路由:require_authenticated_user：
elixir
scope "/", InstagramCloneWeb do
pipe_through [:browser, :require_authenticated_user]
get "/users/settings/confirm_email/:token", UserSettingsController, :confirm_email
live "/accounts/edit", UserLive.Settings
live "/accounts/password/change", UserLive.PassSettings
end然后我们需要创建这些 liveview 文件，在该文件夹内创建一个名为user_liveunder 的文件夹lib/instagram_clone_web/live，添加以下 4 个文件：
lib/instagram_clone_web/live/user_live/settings.ex lib/instagram_clone_web/live/user_live/settings.html.leex lib/instagram_clone_web/live/user_live/pass_settings.ex lib/instagram_clone_web/live/user_live/pass_settings.html.leex
在我们的导航标题中，我们需要链接到该新路线，lib/instagram_clone_web/live/header_nav_component.html.leex在第 60 行打开，将以下内容添加到Settings live_patch to:
elixir
<%= live_patch to: Routes.live_path(@socket, InstagramCloneWeb.UserLive.Settings) do %>
<li class="py-2 px-4 hover:bg-gray-50">Settings</li>
<% end %>现在，当我们访问该链接时，我们应该会出现错误，因为文件是空的，因此打开lib/instagram_clone_web/live/user_live/settings.ex并添加以下内容：
elixir
defmodule InstagramCloneWeb.UserLive.Settings do
use InstagramCloneWeb, :live_view
@impl true
def mount(_params, session, socket) do
socket = assign_defaults(session, socket)
{:ok, socket}
end
end现在我们应该有一个空白页面，只有顶部导航栏，所以让我们开始工作吧。
我们将需要Accounts和User上下文，我们将为它们添加别名并分配变更集，我们的文件应如下所示：
elixir
defmodule InstagramCloneWeb.UserLive.Settings do
use InstagramCloneWeb, :live_view
alias InstagramClone.Accounts
alias InstagramClone.Accounts.User
@impl true
def mount(_params, session, socket) do
socket = assign_defaults(session, socket)
changeset = Accounts.change_user(socket.assigns.current_user)
{:ok,
socket
|> assign(changeset: changeset)}
end
end我们需要将change_user()函数添加到Accounts上下文中，打开lib/instagram_clone/accounts.ex并在change_user_registration()函数下面添加以下内容：
elixir
...
def change_user(user, attrs \\ %{}) do
User.registration_changeset(user, attrs, register_user: false)
end
...打开lib/instagram_clone_web/live/user_live/settings.html.leex并将表单添加到模板中：
elixir
<section class="border-2 flex" x-data="{username: '<%= @current_user.username %>'}">
<div class="w-full py-8">
<!-- Profile Photo -->
<div class="flex items-center">
<div class="w-1/3">
<%= img_tag @current_user.avatar_url, class: "ml-auto w-10 h-10 rounded-full object-cover object-center" %>
</div>
<div class="w-full pl-8">
<h1 x-text="username" class="leading-none font-semibold text-lg truncate text-gray-500"></h1>
</div>
</div>
<!-- END PROFILE PHOTO -->
<%= f = form_for @changeset, "#",
phx_change: "validate",
phx_submit: "save",
class: "space-y-8 md:space-y-10" %>
<div class="flex items-center">
<%= label f, :full_name, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= text_input f, :full_name, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", autocomplete: "off" %>
<%= error_tag f, :full_name, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :username, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= text_input f, :username, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", x_model: "username", autocomplete: "off" %>
<%= error_tag f, :username, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :website, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= text_input f, :website, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", autocomplete: "off" %>
<%= error_tag f, :website, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :bio, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= textarea f, :bio, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", rows: 3, autocomplete: "off" %>
<%= error_tag f, :bio, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :email, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= email_input f, :email, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 shadow-sm focus:ring-transparent focus:border-black", autocomplete: "off" %>
<%= error_tag f, :email, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<label class="block w-1/3 font-semibold text-right"></label>
<div class="w-full pl-8 pr-20">
<%= submit "Submit", phx_disable_with: "Saving...", class: "w-16 py-1 px-1 border-none shadow rounded font-semibold text-sm text-gray-50 hover:bg-light-blue-600 bg-light-blue-500 cursor-pointer" %>
</div>
</div>
</form>
</div>
</section>我们添加了表单的基本布局，当您使用 AlpineJs 输入用户名时，用户名标题会更新。现在我们需要将validate()和save()函数添加到我们的lib/instagram_clone_web/live/user_live/settings.ex实时查看文档中，但我们首先将我们分配:page_title给我们的挂载函数：
elixir
@impl true
def mount(_params, session, socket) do
socket = assign_defaults(session, socket)
changeset = Accounts.change_user(socket.assigns.current_user)
{:ok,
socket
|> assign(changeset: changeset)
|> assign(page_title: "Edit Profile")} #This was added
end然后打开lib/instagram_clone_web/templates/layout/root.html.leex并更新页面标题后缀：
elixir
<%= live_title_tag assigns[:page_title] || "InstagramClone", suffix: " · InstagramClone" %>现在让我们将处理表单的函数添加到我们的lib/instagram_clone_web/live/user_live/settings.ex：
elixir
@impl true
def handle_event("validate", %{"user" => user_params}, socket) do
changeset =
socket.assigns.current_user
|> Accounts.change_user(user_params)
|> Map.put(:action, :validate)
{:noreply, socket |> assign(changeset: changeset)}
end
@impl true
def handle_event("save", %{"user" => user_params}, socket) do
case Accounts.update_user(socket.assigns.current_user, user_params) do
{:ok, _user} ->
{:noreply,
socket
|> put_flash(:info, "User updated successfully")
|> push_redirect(to: Routes.live_path(socket, InstagramWeb.UserLive.Settings))}
{:error, %Ecto.Changeset{} = changeset} ->
{:noreply, assign(socket, :changeset, changeset)}
end
end现在我们需要将update_user()函数添加到Accounts上下文中：
elixir
...
def update_user(user, attrs) do
user
|> User.registration_changeset(attrs, register_user: false)
|> Repo.update()
end
...我们对用户名的唯一约束不起作用，因为我们没有在迁移中添加唯一索引，所以我们现在就这样做。在我们的终端中，让我们生成一个迁移$ mix ecto.gen.migration add_users_unique_username_index，然后打开生成的迁移priv/repo/migrations/20210414220125_add_users_unique_username_index.exs并添加以下内容：
elixir
defmodule InstagramClone.Repo.Migrations.AddUsersUniqueUsernameIndex do
use Ecto.Migration
def change do
create unique_index(:users, [:username])
end
end然后返回我们的终端并运行迁移$ mix ecto.migrate
现在让我们更新我们的注册变更lib/instagram_clone/accounts/user.ex集unsafe_validate_unique(:username, InstagramClone.Repo)
elixir
...
def registration_changeset(user, attrs, opts \\ []) do
user
|> cast(attrs, [:email, :password, :username, :full_name, :avatar_url, :bio, :website])
|> validate_required([:username, :full_name])
|> validate_length(:username, min: 5, max: 30)
|> validate_format(:username, ~r/^[a-zA-Z0-9_.-]*$/, message: "Please use letters and numbers without space(only characters allowed _ . -)")
|> unique_constraint(:username)
|> unsafe_validate_unique(:username, InstagramClone.Repo) # --> This was added
|> validate_length(:full_name, min: 4, max: 30)
|> validate_email()
|> validate_password(opts)
end
...:timer.sleep(9000)另外，在测试时，我意识到我在尝试延迟实时验证时犯了一个错误，lib/instagram_clone_web/live/page_live.ex所以让我们从validate()函数中删除该行，因为它会与表单产生冲突：
elixir
@impl true
def handle_event("validate", %{"user" => user_params}, socket) do
changeset =
%User{}
|> User.registration_changeset(user_params)
|> Map.put(:action, :validate)
#:timer.sleep(9000) <-- REMOVE THIS LINE
{:noreply, socket |> assign(changeset: changeset)}
end
完成后，我们应该能够毫无问题地编辑配置文件，所以现在让我们开始上传头像文件。
头像上传
打开lib/instagram_clone_web/live/user_live/settings.ex并允许在实时视图中上传，新的更新文件应如下所示：
elixir
defmodule InstagramCloneWeb.UserLive.Settings do
use InstagramCloneWeb, :live_view
alias InstagramClone.Accounts
alias InstagramClone.Accounts.User
#Files extensions accepted to be uploaded
@extension_whitelist ~w(.jpg .jpeg .png)
@impl true
def mount(_params, session, socket) do
socket = assign_defaults(session, socket)
changeset = Accounts.change_user(socket.assigns.current_user)
{:ok,
socket
|> assign(changeset: changeset)
|> assign(page_title: "Edit Profile")
|> allow_upload(:avatar_url,
accept: @extension_whitelist,
max_file_size: 9_000_000,
progress: &handle_progress/3,#Function that will handle automatic uploads
auto_upload: true)}
end
@impl true
def handle_event("validate", %{"user" => user_params}, socket) do
changeset =
socket.assigns.current_user
|> Accounts.change_user(user_params)
|> Map.put(:action, :validate)
{:noreply, socket |> assign(changeset: changeset)}
end
# Updates the socket when the upload form changes, triguers handle_progress()
def handle_event("upload_avatar", _params, socket) do
{:noreply, socket}
end
@impl true
def handle_event("save", %{"user" => user_params}, socket) do
case Accounts.update_user(socket.assigns.current_user, user_params) do
{:ok, _user} ->
{:noreply,
socket
|> put_flash(:info, "User updated successfully")
|> push_redirect(to: Routes.live_path(socket, InstagramCloneWeb.UserLive.Settings))}
{:error, %Ecto.Changeset{} = changeset} ->
{:noreply, assign(socket, :changeset, changeset)}
end
end
# This will handle the upload
defp handle_progress(:avatar_url, entry, socket) do
end
end打开lib/instagram_clone_web/live/user_live/settings.html.leex并在用户名标题下方添加上传表单，并将该表单@uploads分配给我们的套接字：
elixir
<section class="border-2 flex" x-data="{username: '<%= @current_user.username %>'}">
<div class="w-full py-8">
<%= for {_ref, err} <- @uploads.avatar_url.errors do %>
<p class="text-red-500 w-full text-center">
<%= Phoenix.Naming.humanize(err) %>
</p>
<% end %>
<!-- Profile Photo -->
<div class="flex items-center">
<div class="w-1/3">
<%= img_tag @current_user.avatar_url, class: "ml-auto w-10 h-10 rounded-full object-cover object-center" %>
</div>
<div class="w-full pl-8">
<h1 x-text="username" class="leading-none font-semibold text-lg truncate text-gray-500"></h1>
<!-- THIS WAS ADDED -->
<div class="relative">
<%= form_for @changeset, "#",
phx_change: "upload_avatar" %>
<%= live_file_input @uploads.avatar_url, class: "cursor-pointer relative block opacity-0 z-40 -left-24" %>
<div class="text-center absolute top-0 left-0 m-auto">
<span class="font-semibold text-sm text-light-blue-500">
Change Profile Photo
</span>
</div>
</form>
</div>
<!-- THIS WAS ADDED END -->
</div>
</div>
<!-- END PROFILE PHOTO -->
<%= f = form_for @changeset, "#",
phx_change: "validate",
phx_submit: "save",
class: "space-y-8 md:space-y-10" %>
<div class="flex items-center">
<%= label f, :full_name, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= text_input f, :full_name, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", autocomplete: "off" %>
<%= error_tag f, :full_name, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :username, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= text_input f, :username, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", x_model: "username", autocomplete: "off" %>
<%= error_tag f, :username, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :website, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= text_input f, :website, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", autocomplete: "off" %>
<%= error_tag f, :website, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :bio, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= textarea f, :bio, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black", rows: 3, autocomplete: "off" %>
<%= error_tag f, :bio, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :email, class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= email_input f, :email, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 shadow-sm focus:ring-transparent focus:border-black", autocomplete: "off" %>
<%= error_tag f, :email, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<label class="block w-1/3 font-semibold text-right"></label>
<div class="w-full pl-8 pr-20">
<%= submit "Submit", phx_disable_with: "Saving...", class: "w-16 py-1 px-1 border-none shadow rounded font-semibold text-sm text-gray-50 hover:bg-light-blue-600 bg-light-blue-500 cursor-pointer" %>
</div>
</div>
</form>
</div>
</section>现在让我们创建一个模块来帮助我们处理头像上传。在下面lib/instagram_clone_web/live添加一个名为 的文件夹uploaders，并在该文件夹内添加一个名为 的文件avatar.ex。我们将调整头像的大小，因此让我们添加 Mogrify 依赖项来处理它，确保安装了 ImageMagick，打开mix.exs并添加到我们的项目依赖项{:mogrify, "~> 0.8.0"}，然后在我们的终端中$ mix deps.get && mix deps.compile。
现在打开lib/instagram_clone_web/live/uploaders/avatar.ex并添加以下内容：
elixir
defmodule InstagramClone.Uploaders.Avatar do
alias InstagramCloneWeb.Router.Helpers, as: Routes
# We are going to upload locally so this would be the name of the folder
@upload_directory_name "uploads"
@upload_directory_path "priv/static/uploads"
# Returns the extensions associated with a given MIME type.
defp ext(entry) do
[ext | _] = MIME.extensions(entry.client_type)
ext
end
# Returns the url path
def get_avatar_url(socket, entry) do
Routes.static_path(socket, "/#{@upload_directory_name}/#{entry.uuid}.#{ext(entry)}")
end
def update(socket, old_url, entry) do
# Creates the upload directry path if not exists
if !File.exists?(@upload_directory_path), do: File.mkdir!(@upload_directory_path)
# Consumes an individual uploaded entry
Phoenix.LiveView.consume_uploaded_entry(socket, entry, fn %{} = meta ->
# Destination paths for avatar thumbs
dest = Path.join(@upload_directory_path, "#{entry.uuid}.#{ext(entry)}")
dest_thumb = Path.join(@upload_directory_path, "thumb_#{entry.uuid}.#{ext(entry)}")
# meta.path is the temporary file path
mogrify_thumbnail(meta.path, dest, 300)
mogrify_thumbnail(meta.path, dest_thumb, 150)
# Removes Old Urls Paths
rm_file(old_url)
old_url |> get_thumb() |> rm_file()
end)
:ok
end
def get_thumb(avatar_url) do
file_name = String.replace_leading(avatar_url, "/uploads/", "")
["/#{@upload_directory_name}", "thumb_#{file_name}"] |> Path.join()
end
def rm_file(old_avatar_url) do
url = String.replace_leading(old_avatar_url, "/uploads/", "")
path = [@upload_directory_path, url] |> Path.join()
if File.exists?(path), do: File.rm!(path)
end
# Resize the file with a given path, destination, and size
defp mogrify_thumbnail(src_path, dst_path, size) do
try do
Mogrify.open(src_path)
|> Mogrify.resize_to_limit("#{size}x#{size}")
|> Mogrify.save(path: dst_path)
rescue
File.Error -> {:error, :invalid_src_path}
error -> {:error, error}
else
_image -> {:ok, dst_path}
end
end
end在文件顶部打开lib/instagram_clone_web/live/user_live/settings.ex新创建的模块的别名，并使用以下内容更新我们的函数：Avataralias InstagramClone.Uploaders.Avatarhandle_progress()
elixir
defp handle_progress(:avatar_url, entry, socket) do
# If file is already uploaded to tmp folder
if entry.done? do
avatar_url = Avatar.get_avatar_url(socket, entry)
user_params = %{"avatar_url" => avatar_url}
case Accounts.update_user(socket.assigns.current_user, user_params) do
{:ok, _user} ->
Avatar.update(socket, socket.assigns.current_user.avatar_url, entry)
@doc """
We have to update the current user and assign it back to the socket
to get the header nav thumbnail automatically updated
"""
current_user = Accounts.get_user!(socket.assigns.current_user.id)
{:noreply,
socket
|> put_flash(:info, "Avatar updated successfully")
|> assign(current_user: current_user)}
{:error, %Ecto.Changeset{} = changeset} ->
{:noreply, assign(socket, :changeset, changeset)}
end
else
{:noreply, socket}
end
end最后，我们需要提供上传目录中将要创建的文件，打开lib/instagram_clone_web/endpoint.ex并更新静态插件中的第 27 行：
elixir
only: ~w(css fonts images js favicon.ico robots.txt uploads)现在一切都应该工作得很好，但我们正在上传缩略图，所以让我们在模板中使用它，打开lib/instagram_clone_web/live/header_nav_component.html.leex并更新第 43 行以使用我们的缩略图 URL：
elixir
<%= img_tag InstagramClone.Uploaders.Avatar.get_thumb(@current_user.avatar_url), class: "w-full h-full object-cover object-center" %>同时打开lib/instagram_clone_web/live/user_live/settings.html.leex并更新第 7 行以使用我们的缩略图：
elixir
<%= img_tag Avatar.get_thumb(@current_user.avatar_url), class: "ml-auto w-10 h-10 rounded-full object-cover object-center" %>密码更改设置
现在剩下的唯一一件事就是更改密码，我们将需要一个侧面导航栏，因此让我们创建一个组件来处理它，因为它将与密码更改 LiveView 共享。在下面lib/instagram_clone_web/live/user_live添加以下2个文件：
lib/instagram_clone_web/live/user_live/settings_sidebar_component.ex lib/instagram_clone_web/live/user_live/settings_sidebar_component.html.leex
添加lib/instagram_clone_web/live/user_live/settings_sidebar_component.ex以下内容：
elixir
defmodule InstagramCloneWeb.UserLive.SettingsSidebarComponent do
use InstagramCloneWeb, :live_component
end添加lib/instagram_clone_web/live/user_live/settings_sidebar_component.html.leex以下内容：
elixir
<div class="w-1/4 border-r-2">
<ul>
<%= live_patch content_tag(:li, "Edit Profile", class: "p-4 #{selected_link?(@current_uri_path, @settings_path)}"), to: @settings_path %>
<%= live_patch content_tag(:li, "Change Password", class: "p-4 #{selected_link?(@current_uri_path, @pass_settings_path)}"), to: @pass_settings_path %>
</ul>
</div>render_helpers.ex在 下创建一个名为lib/instagram_clone_web/live. 打开lib/instagram_clone_web/live/render_helpers.ex并执行以下操作：:
elixir
defmodule InstagramCloneWeb.RenderHelpers do
def selected_link?(current_uri, menu_link) when current_uri == menu_link do
"border-l-2 border-black -ml-0.5 text-gray-900 font-semibold"
end
def selected_link?(_current_uri, _menu_link) do
"hover:border-l-2 -ml-0.5 hover:border-gray-300 hover:bg-gray-50"
end
end这些功能将帮助我们为侧面导航栏中的链接获取正确的样式。现在我们需要在模板中提供这些函数，打开lib/instagram_clone_web.ex视图助手函数并将其更新为以下内容：
elixir
defp view_helpers do
quote do
# Use all HTML functionality (forms, tags, etc)
use Phoenix.HTML
# Import LiveView helpers (live_render, live_component, live_patch, etc)
import Phoenix.LiveView.Helpers
# Import basic rendering functionality (render, render_layout, etc)
import Phoenix.View
import InstagramCloneWeb.ErrorHelpers
import InstagramCloneWeb.Gettext
import InstagramCloneWeb.RenderHelpers # <-- THIS LINE WAS ADDED
alias InstagramCloneWeb.Router.Helpers, as: Routes
end
end让我们将路径分配给套接字，打开lib/instagram_clone_web/live/user_live/settings.ex并在安装中添加以下内容：
elixir
def mount(_params, session, socket) do
socket = assign_defaults(session, socket)
changeset = Accounts.change_user(socket.assigns.current_user)
# THIS WAS ADDED
settings_path = Routes.live_path(socket, __MODULE__)
pass_settings_path = Routes.live_path(socket, InstagramCloneWeb.UserLive.PassSettings)
{:ok,
socket
|> assign(changeset: changeset)
|> assign(page_title: "Edit Profile")
|> assign(settings_path: settings_path, pass_settings_path: pass_settings_path)# <-- THIS WAS ADDED
|> allow_upload(:avatar_url,
accept: @extension_whitelist,
max_file_size: 9_000_000,
progress: &handle_progress/3,
auto_upload: true)}
endlib/instagram_clone_web/live/user_live/settings.html.leex在标签开头下方顶部的部分标签内打开，让我们插入我们的组件：
elixir
<%= live_component @socket, InstagramCloneWeb.UserLive.SettingsSidebarComponent,
settings_path: @settings_path,
pass_settings_path: @pass_settings_path,
current_uri_path: @current_uri_path %>打开lib/instagram_clone_web/live/user_live/pass_settings.ex添加以下内容：
elixir
defmodule InstagramCloneWeb.UserLive.PassSettings do
use InstagramCloneWeb, :live_view
def mount(_params, session, socket) do
socket = assign_defaults(session, socket)
settings_path = Routes.live_path(socket, InstagramCloneWeb.UserLive.Settings)
pass_settings_path = Routes.live_path(socket, __MODULE__)
{:ok,
socket
|> assign(settings_path: settings_path, pass_settings_path: pass_settings_path)}
end
end然后打开lib/instagram_clone_web/live/user_live/pass_settings.html.leex添加以下内容：
elixir
<section class="border-2 flex">
<%= live_component @socket, InstagramCloneWeb.UserLive.SettingsSidebarComponent,
settings_path: @settings_path,
pass_settings_path: @pass_settings_path,
current_uri_path: @current_uri_path %>
</section>
让我们将表单添加到lib/instagram_clone_web/live/user_live/pass_settings.html.leex：
elixir
<section class="border-2 flex">
<%= live_component @socket, InstagramCloneWeb.UserLive.SettingsSidebarComponent,
settings_path: @settings_path,
pass_settings_path: @pass_settings_path,
current_uri_path: @current_uri_path %>
<div class="w-full py-5">
<!-- Profile Photo -->
<div class="flex items-center">
<div class="w-1/3">
<%= img_tag Avatar.get_thumb(@current_user.avatar_url), class: "ml-auto w-10 h-10 rounded-full object-cover object-center" %>
</div>
<div class="w-full pl-8">
<h1 class="font-semibold text-xl truncate text-gray-600"><%= @current_user.username %></h1>
</div>
</div>
<!-- End Profile Photo -->
<%= f = form_for @changeset, "#",
phx_submit: "save",
class: "space-y-5 md:space-y-8" %>
<div class="md:flex items-center">
<%= label f, :old_password, "Old Password", class: "w-1/3 text-right font-semibold", for: "current_password_for_password" %>
<div class="w-full pl-8 pr-20">
<%= password_input f, :current_password, required: true, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black" %>
<%= error_tag f, :current_password, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<%= label f, :password, "New Password", class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= password_input f, :password, required: true, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black" %>
<%= error_tag f, :password, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="md:flex items-center">
<%= label f, :password_confirmation, "Confirm New Password", class: "w-1/3 text-right font-semibold" %>
<div class="w-full pl-8 pr-20">
<%= password_input f, :password_confirmation, required: true, class: "w-4/6 rounded p-1 text-semibold text-gray-600 border-gray-300 focus:ring-transparent focus:border-black" %>
<%= error_tag f, :password_confirmation, class: "text-red-700 text-sm block" %>
</div>
</div>
<div class="flex items-center">
<label class="w-1/3"></label>
<div class="w-full pl-8 pr-20">
<%= submit "Change Password", phx_disable_with: "Saving...", class: "py-1 px-2 border-none shadow rounded font-semibold text-sm text-gray-50 hover:bg-light-blue-600 bg-light-blue-500 cursor-pointer" %>
</div>
</div>
<div class="flex items-center">
<label class="w-1/3"></label>
<div class="w-full pl-8 pr-20 text-right">
<%= link "Forgot Password?", to: Routes.user_reset_password_path(@socket, :new), class: "font-semibold text-xs hover:text-light-blue-600 text-light-blue-500 cursor-pointer hover:underline" %>
</div>
</div>
</form>
</div>
</section>最后更新lib/instagram_clone_web/live/user_live/pass_settings.ex如下：
elixir
defmodule InstagramCloneWeb.UserLive.PassSettings do
use InstagramCloneWeb, :live_view
alias InstagramClone.Accounts
alias InstagramClone.Accounts.User
alias InstagramClone.Uploaders.Avatar
@impl true
def mount(_params, session, socket) do
socket = assign_defaults(session, socket)
settings_path = Routes.live_path(socket, InstagramCloneWeb.UserLive.Settings)
pass_settings_path = Routes.live_path(socket, __MODULE__)
user = socket.assigns.current_user
{:ok,
socket
|> assign(settings_path: settings_path, pass_settings_path: pass_settings_path)
|> assign(:page_title, "Change Password")
|> assign(changeset: Accounts.change_user_password(user))}
end
@impl true
def handle_event("save", %{"user" => params}, socket) do
%{"current_password" => password} = params
case Accounts.update_user_password(socket.assigns.current_user, password, params) do
{:ok, _user} ->
{:noreply,
socket
|> put_flash(:info, "Password updated successfully.")
|> push_redirect(to: socket.assigns.pass_settings_path)}
{:error, changeset} ->
{:noreply, assign(socket, :changeset, changeset)}
end
end
end转到lib/instagram_clone/accounts.ex第 208 行，并更新update_user_password()为以下内容：
elixir
def update_user_password(user, password, attrs) do
user
|> User.password_changeset(attrs)
|> User.validate_current_password(password)
|> Repo.update()
end在下一部分中，我们将处理用户的个人资料。