Programming Phoenix LiveView (Pragmatic Bookshelf)
Most Active This Week
Most Active This Month
scope = Accounts.get_scope_for_user(user.id)
Is wrong and should be:
scope = Accounts.Scope.for_user(user)
New
Most Active This Year
At start of the page log_out_user/1on_mount/4 should be on separate lines
iex> exports PentoWeb.UserAuth
__phoenix_verify_routes__/1
...
New
Title: Programming Phoenix LiveView
I am not sure if this an appropriate way to send feedback for this book. It seems like the defacto i...
New
Title: Programming Phoenix LiveView: Mount and Render the Product Index • 115
… let’s examine the socket assigns now. Add the following...
New
There’s no simple_form/1 in phoenix 1.8
So this code
<div>
<.simple_form
for={@form}
id="promo-form"
phx-change=...
New
In Install Elixir, Postgres, Phoenix, and LiveView it says:
Make sure you get at least the minimal version of Elixir (>= 1.14 as of ...
New
On page 139 in the iex session in the Test Drive the Schema section, the instruction is to execute Product.changeset/2. However, the prev...
New
p81: live "/products/new", ProductLive.Index, :new – as you noted just above, the generator in Phoenix 1.8 puts this in ProductLive.Form,...
New
There looks to be a misprint on page 217 of Book version: P1.0—March, 2026. A code block is displayed of a <.form> component with a...
New
p2: we update a yet another element. Delete "a ".
p11: you might seeing – s/seeing/see/
p12: <imagedata fileref=”images/intro/phoenix-...
New
happy to get the email this morning about the 1.1 version of the book! Just last night I spent an unnecessary amount of time figuring out...
New
In the brief description of ~/pento/lib/pento/promo/recipient.ex it says ‘… Then we disable our primary key since our live view won’t mak...
New
Title: Programming Phoenix LiveViw: v1.0 (page 84)
Example: Version mismatches in Chapter 3
There numerous mismatches between instructi...
New
The paragraph below the code says:
“The only difference in this implementation and the previous is the call to
params_with_image.”
It ...
New
Most Active Last Three Years
Disclaimer: I hope all of this is accurate, and not the result of some stupid typo I failed to notice. Anyways…
This post comprises 2 is...
New
The schemaless form defined in file “lib/pento_web/live/promo_live.html.heex” on page 133 of the book requires some transformation. The :...
New
Hi, I just finished reading Programming Phoenix LiveView B10 PDF edition.
I found some typos and errata, and I will report them all in t...
New
The code example at the top of page 140 includes the phx-debounce=blur binding:
<.input field={@form[:email]} type="email"
label="E...
New
The changelog for LiveView 0.20.x stated the deprecation. It seems like it’s largely only a name change, i.e., there’s no functional diff...
New
The 3rd paragraph on the page states:
Our <.header> function invocation in the index template doesn’t make use of the <:subtit...
New
Hi! To get to see the shapes on the board, I think that where it says:
# lib/pento_web/live/game_live/board.ex
def assign_shapes(%{assig...
New
In PentoWeb.RatingLive.Index.product_rating/1 function, there is a call to <RatingLive.Show.stars rating={rating} product={@product} /...
New
if active Pentominos do not showup on the screen it is due to this line on p369
defp assign_shapes(%{assigns: %{board: board}} = socket)...
New
The last line in the first paragraph on page 99 reads:
…put certain instructions in socket.products.inserts or socket.products.deletes....
New
Second paragraph in section Protect Routes with Plugs says "The authentication service is defined in the file lib/pento_web/controllers/u...
New
In this paragraph:
The schema macro is not the only aspect of the Product module that helps us interact with the products database tabl...
New
Page 100
Add the following snippet to your index.html.eex template:
index.html.heex
Page 105
Our <.header> function invocati...
New
Talking about the Contex library, I think there is a tiny typo when referencing the library on page 246 (certainly because of auto-correc...
New
The first paragraph on page 219 mentions a checkbox:
Then, we use the heading/1 component that we’ll define in a bit to show a heading ...
New
Most Active Over Three Years
In general, the book isn’t yet updated for Phoenix version 1.6. On page 18 of the book, the authors indicate that an auto generated of ro...
New
The markup used to display the uploaded image results in a Phoenix.LiveView.HTMLTokenizer.ParseError error.
lib/pento_web/live/product_l...
New
It seems the second code snippet is missing the code to set the current_user:
current_user: Accounts.get_user_by_session_token(session["...
New
The generated iex result below should list products instead of product for the metadata. (page 67)
iex> product = %Product{}
%Pento....
New
Hi! I know not the intentions behind this narrative when called, on page XI:
mount() |> handle_event() |> render()
but the correc...
New
root_layout: {PentoWeb.LayoutView, :root},
This results in the following following error:
no “root” html template defined for PentoWeb...
New
Book: Programming Phoenix LiveView, page 142 (157/378), file lib/pento_web/live/product_live/form_component.ex, in the function below:
d...
New
“The ProductLive.Index template calls a helper function, live_component/3, that in turn calls on the modal component. ”
Excerpt From: Br...
New
A further clarification: When I move to the “Stateful components” section and run a compile with “iex -S mix”, the compile works. When I ...
New
The right lifecycle should be
mount/3
handle_prams/3
render/3
New
Title: Programming Phoenix LiveView B8 - entire Ch4 modal component section needs correcting (Page 101-114)
Example: Programming Flutter...
New
On Chapter 3 - Page 78, the beginning of the page has this code here:
@doc """
Maybe it is missing to put the Pento context before Cata...
New
(Phoenix 1.6.6, Ecto 3.7.2, Elixir 1.13)
When building the custom Survey context, we are told to then update the rating.ex file with the...
New
The introduction instructions under section “Build a Simple LiveView” are incomplete. If followed from book one gets the following error:...
New
In the code sample for auth /pento/lib/pento_web/live/user_auth_live.ex the on_mount function is defined as:
on_mount(_, params, %{"user...
New
Publisher:
Pragmatic Bookshelf
Latest in Programming Phoenix LiveView
Get money off!
The Pragmatic Bookshelf
35% off any eBook
Use the coupon code "devtalk.com" to get 35% off any eBook published by PragProg!
Filter by Type:
Devtalk Sponsors
Practical resources that improve the lives of professional developers.
We build trusted fault-tolerant systems that scale to billions of users.
Real-time error tracking, performance insights, and observability for devs.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Develop your skills with books, videos, and courses.
Catch errors, track performance, monitor hosts and more.
Enabling companies to succeed by building software people love.
Courses that move you from confusion to "Aha, now I get it!"
Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.