Hey all,
Juggernaut is a plugin that provides realtime connection between your
servers and client browsers. You can literally push data to clients
using your web application.
The instructions say to instantiate the Juggernaut object and
subscribe to the channel:
jug = new Juggernaut({ host:
thanks for response
On Sep 19, 4:26 am, Frederick Cheung frederick.che...@gmail.com
wrote:
On Sep 18, 7:40 pm, 7stud -- li...@ruby-forum.com wrote:
2) What exactly is the point of render_to_string? Why can't we just
use render? Or do we need to use render_to_string in order to use
the
Hey all,
This is my understanding of html and browsers. On the server, html is
plain text. When the browser sends request to server to fetch a
document, if the file is not already in html format, perhaps instead
in an rb file, ruby or whatever the server-side language of choice
converts the file
this was incredible response, everything was explained so clearly.
On Sep 18, 2:40 pm, 7stud -- li...@ruby-forum.com wrote:
John Merlino wrote in post #1022569:
Hey all,
This is my understanding of html and browsers. On the server, html is
plain text. When the browser sends request
thanks for responses
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Hey all,
This example of working code:
@a = @b.where(:a_group_id.ne = nil).collect { |b| b.a_group }
doesn't make too much sense to me. For one, I am not sure what that
ne is doing there. Is this a postgresql thing? Second, it looks like
we are collecting active record objects where the
thanks for response. What you said explained a lot.
Now I have never seen rails code written like that. Would it have been
better to do this:
@b.map(:a_group).compact.uniq
On Sep 11, 11:32 am, Robert Walker li...@ruby-forum.com wrote:
John Merlino wrote in post #1021280:
Hey all
bump
The reason why player path wasnt working was because it required an
instance of player: player_path(@player). But I am still stuck as to
why dashboard_sidebar_path isn't working when the route clearly shows
up when running rake routes.
On Sep 4, 4:20 pm, John Merlino stoici...@aol.com wrote
thanks for response, and the explanation of capture(). When I removed
the concat from the helper, the title stopped rendering twice. I
thought the concat was used to concatenate the two blocks of html, but
after reading documentation it appears it's to render haml without
using =.
On Sep 5, 8:19
in the
scope, so I dont know why the error.
thanks for response
On Aug 31, 5:42 pm, John Merlino li...@ruby-forum.com wrote:
I havent tested it yet but thanks for response
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, 2011 at 3:42 PM, John Merlino stoici...@aol.com wrote:
So I tried using the :as option for the named route so I could have
dashboard_sidebar_path helpers.
scope :path = '/dashboard', :controller = :dashboard do
match '/sidebar.:format' = :sidebar, :as = 'dashboard_sidebar'
match
hey all,
My index.html.haml:
- wrap do
- page_title Teams List View
application_helper.rb:
def page_title(title)
content_tag :h1, title
end
def wrap(block)
concat(content_tag(:div, capture(block), :class =
generic_header))
end
I load in browser and get:
div
thanks for responses
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Hey all,
Rails guide doesnt cover with_options in Rails 3:
http://guides.rubyonrails.org/routing.html
The book The Rails 3 Way makes no reference to with_options except for
one page briefly.
And I cannot find a decent tutorial to cover what I am trying to do.
I have this:
map.with_options
I tried this:
scope :path = '/dashboard', :name_prefix = dashboard_, :path_prefix
= dashboard, :controller = :dashboard do
match '/sidebar.:format' = :sidebar
match '/charts.:format' = :charts
match '/action_items.:format' = :action_items
match '/performance.:format' =
I tried a named route and I get this:
undefined local variable or method `dashboard_sidebar_path'
any idea?
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I havent tested it yet but thanks for response
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Hey all,
I have this in view:
- if site_action_enabled?(:site_flag_enabled, Site)
And I have this in application controller:
def site_action_enabled?(operation, resource)
if resource.is_a?(Class) resource == Site
return current_user.site.call operation
else
My understanding of the + operator is as follows. The + operator works
differently with arrays than it does with scalar values. With arrays, when
taking two arrays as operands, it returns an array containing everything in
the two oeprand arrays. In essence, + operator performs addition on
Hey all,
Let's say we have this:
#view
= section Contact do
- field_list :class = contacts-view do |v|
= v.item Contact Type, @contact.contact_type
#helper
def section(*args, block)
label = String === args.first ? args.first : String ===
args.second ? args.second : nil
klass =
Hey all,
The Subject line may be a bad question, whether it's possible to
invoke a class method on an array of objects. But look at the code
below, and unless I am misunderstanding, that's what appears to be
going on, and yes the code does work:
class Dog
def total_caught
Cat.counters(:dog
Hey all,
This here is not working:
task(:load_selected = :load_config) do
IgnoreTables = %w('students')
begin
ActiveRecord::Base.establish_connection
ActiveRecord::Base.connection.tables.each do |table|
if IgnoreTables.include? table
puts Its
Hi all,
What I am trying to do:
1) Search for books at a specific school
2) Iterate through each book and find all its related subbooks where
the book state is of a specific type
3) Return an array of those subbooks for each book
4) Since the array will have subarrays of the subbooks, flatten
, only
instances of the class.
Is this the problem and how would I address it?
Thanks for response
On Jun 28, 1:34 pm, Michael Pavling pavl...@gmail.com wrote:
On 28 June 2011 18:10, John Merlino stoici...@aol.com wrote:
available_books = books.each.map do |book|
book.subbooks.where
hmmm, this returns true as well:
logger.info is true? #{available_books.flatten.first.respond_to?
('sequence')}
On Jun 28, 3:22 pm, John Merlino stoici...@aol.com wrote:
Thanks for response. I checked with logger and it is indeed an array:
logger.info Is array
actually you are right. my intention was to get the object with the
smallest sequence number, not return the sequence number itself. The
ruby documentation says this: Returns the object in enum with the
minimum value. for min. Hence, I thought it would return the object.
I suspect the error is
Hey all,
I created a seed task:
def books!
books = Book.where(:type_id =
Type.find_by_name('Fiction')).order('id')
books.each do |book|
@books = 4.times.map do |i|
subbook! #{book.book_num}-#{i}.to_s, :book_state =
BookState[:available].id, :book = book
end
end
Hey all,
Out of curiousity, all in Rails grabs all the records and converts
them into an array. Map then iterates through the returned array,
returning a new array. So why even use map here? And then the array
gets passed as local variable bt. And we instantiate object and assign
the bt array as
Hey all,
I have a question about this line of code:
within #main-menu do
find(h6, :text = menu).click if menu
click_link link
end
def within(selector, blk)
new_blk = proc do
begin
scope_selectors.push(selector)
blk.call
ensure
scope_selectors.pop
end
I still dont think I am fully clear on the Class class role.
For example:
ruby-1.8.7-p330 :010 class Class
ruby-1.8.7-p330 :011? def is_a?
ruby-1.8.7-p330 :012? puts 'a'
ruby-1.8.7-p330 :013? end
ruby-1.8.7-p330 :014? end
= nil
ruby-1.8.7-p330 :015 A.is_a?
a
= nil
ruby-1.8.7-p330
Let me see if I fully understand this.
This:
Object.instance_eval
def a
puts 'a'
end
end
is equivalent to this:
class Object
def self.a
puts 'a'
end
end
Basically, instance_eval invoked on Object creates a new class method
for the Object class (or for class Class? and if it is
but instances of Object aren't i.e. Object.kind_of? Class is the wrong
test - Object.new.kind_of?(Class) (or in your specific example,
Peach.new.kind_of?(Class)) is the relevant one.
Fred
Thanks for response
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Hey all,
I am a little confused about a tutorial I read. Here's an example below
taken from the tutorial:
Object.instance_eval do
def has_attribute( *attrs )
attrs.each do | attr |
self.class_eval %Q{
def #{attr}=(val)
Hey all,
Let's say you want a customized route. You want to create a helper for
it (e.g. password_recovery_root_path) and a url path (e.g.
passwords/recovery) that when it is invoked, points the user to the
passwords controller's get_email method. So you would do this:
map.resources
validates_presence_of is a method call, :unless is the key part of
the hash part of the parameters to validates_presence_of, and the proc
(equivalent to Proc.new) part is sent as the value to key :unless.
Hope that was short enough.
Thanks for response. I see what it's doing now.
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Hey all,
There's a core Class class and core Object class in Ruby library:
http://www.ruby-doc.org/core/classes/Object.html
http://www.ruby-doc.org/core/classes/Class.html
First, let's resolve the simple distinction between an Object and Class
as envisioned by Smalltalk but within the Ruby
Hey all,
This line of code I am having trouble understanding what it's doing:
validates_presence_of :email, :unless = proc { |this|
this.validation_context == :create_user }
Basically, there is a code block that floats adjacent to a method. The
method is called and returns a value. That yielded
Hey all,
Let's say you have a controller class and you include a module:
class ApplicationController ActionController::Base
include AuthenticationSystem
def default_page
case
when cu.group_is?(:a) then a_path
when cu.group_is?(:b) then b_path
when cu.group_is?(:c)
The point of this is to call helper_method :current_user. You can look
up what helper_method does in the rails docs.
Fred
ok so basically this allows you to use current_user in your views.
thanks for response
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Hey all,
I see this line of code:
RestClient.send(verb, url, parameters)
Basically there's two rails application that communicate with each
other. RestClient is a rails gem. Here we send the get http verb and a
url string comprising of the other application base url and append a
query string to
The argument to caller is optional. You might also want to install
ruby-debug and add a breakpoint.
Fred
Yeah kind of like breakpoint in C++. Thanks for response.
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Hey all,
I get error like this:
ActionView::TemplateError
(`@content_for_details_view_builder__-626960428' is not allowed as an
instance variable name) in app/views/shared/_details_view.haml:
searchlogic (2.4.27) lib/searchlogic/rails_helpers.rb:75:in
`fields_for'
searchlogic (2.4.27)
Hey all, application completely breaks down in production mode. I
followed the execution file by file line by line and yet I cannot figure
out where an instance variable is being generated from. But I have a
suspicion. This method right here:
# neeeded becasuse of a rails bug
def to_s
Philip Hallstrom wrote in post #996721:
On May 4, 2011, at 6:39 PM, John Merlino wrote:
I think it's cause of problem. I also noticed that the developer left a
comment above it. Problem is it's part of a class that gets yielded into
a ruby block and there's a number of partials that get
Frederick Cheung wrote in post #995797:
On Apr 29, 3:04am, John Merlino li...@ruby-forum.com wrote:
Settings.session_token_domain}
1) I look in Session class and there is no create! class method. Yet it
works and doesn't throw an exception.
With so little context it is hard to say
Obviously
map.resources :sessions, :member = {:validate = :get}, :new = {:start =
:get}, :only = %w(create new)
creates new route for you like the one you have in new method
redirect_to start_new_session_path and return if current_user
Thanks for response. I do notice this:
form_tag
Hey all,
I am looking through this example Rails app where a user session is
stored in cookie so user signs up in one rails app and navigates to
another while still being signed in as unique user. I come across this
line of code where I don't understand where some of these methods are
coming
Hey all,
I'm looking at this route below:
map.resources :sessions, :member = {:validate = :get}, :new = {:start
= :get}, :only = %w(create new)
It's clear the sessions has the 7 restful routes but each member of a
collection of records can also be influenced by the validate method.
Then I come
M Daubs wrote in post #995201:
I believe you only have two restful routes (create and new) because of
the line:
:only = %w(create new)
And the start action is defined as an alternative new action here,
probably because the original author wanted a GET instead of POST (/
Hey all,
I'm using devise plugin for rails. When the user creates a new session,
in addition to devise authenticating the user, I want to check if the
user is enabled by checking the value of the enabled (a boolean) field
in the database. If the value is 0, I want to alert user that they
haven't
While I almost got the behavior I want, there's a problem:
def create
@user = User.authenticate(params[:user])
if !@user.enabled
render shared_navigation/confirmation
elsif request.post? #just using else instead of elsif request.post?
gives same unwanted behavior
Hey all,
In app/builders, I have a file called table_builder.rb. In the
constructor method of my TableBuilder class, I call an instance method
called assign_attributes which takes a hash and converts the key/value
pairs into instance methods.
The assign_attributes method is declared in the
I restarted the server and it appears to have worked.
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Hey all,
This right here:
scope :index_blog, {
:select = blog_posts.*,
:joins = INNER JOIN categories ON category.id =
blog_posts.category_id,
:conditions =blog_posts.enabled = 1
}
returns this:
Mysql2::Error: Not unique table/alias: 'categories': SELECT blog_posts.*
FROM
Actually, all i wanted to do initially was this:
def filter_scoper(scoper)
logger.info The current class is #{self.class}
#CategoriesController
if params.has_key? :filter
send :#{params[:filter]}_filter_scoper, scoper
elsif self.class.respond_to?(:blog_filter_scoper)
ok I must never forget that in haml it works like this:
- @resources.each do |r|
%h1= r.title
%p= r.body
not this:
= @resources.each do |r|
%h1- r.title
%p- r.body
Otherwise, you will get an ActiveRecord array as an object.
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It would appear to me that your immediate problem is the line of code I
pointed out above.
Yeah I got it now. Basically:
if self.class.respond_to?
will only respond to class methods of the class, not instance methods
and since attr_accessor returns instance methods, that if will return
Hey all,
I think I need some help with best practices for debugging. So I am
familiar with logger.info e.g. The variable is #{@variable}. This
helps when I want to inspect the value of a variable on my local
machine. However, it doesn't get output to the production log so when
the site runs on
Hey all,
this order_by method right here is throwing an exception:
@resource_model.order_by(@order_field)
The exception is TypeError (Cannot visit Category):
I think it's returning this:
#ActiveRecord::Relation:0x01038701f0
I have no clue why. It's supposed to be returning a string like
Thanks for responses. So it's possible to call include? on a method?
dom_class.include?(sortable)
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Phil Crissman wrote in post #992790:
On Thu, Apr 14, 2011 at 10:09 AM, John Merlino li...@ruby-forum.com
wrote:
Thanks for responses. So it's possible to call include? on a method?
dom_class.include?(sortable)
Well, you aren't calling include? on the method, per se... you're
calling
Hey all,
Hash vs methods may seem like a silly question, but in certain
situations I don't understand why you would use a method over a hash.
For example, take a look at this method:
#this is defined in a class called core.rb
def assign_attributes(attributes)
attributes.each_pair { |k,v|
Kendall Gifford wrote in post #991124:
Have you tried adding:
StaticDataGenerator.new.posts!
to the end of your file?
Thanks for response. yes, that worked. That makes sense that you need to
call a method in client code for it to do anything. I do have one
unexpected result. This method
def posts!
Title.each_with_index do |t, i|
post! t, Body[i], @current_user.id
end
end
each_for_index is very helpful. Thanks a lot for responses.
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Hey all,
I'm building a html helper.
My view looks like this:
= item_view title, @post.title, :class = 'stuff'
My helper looks like this:
def format_item_data(data)
case data
when Class then ''
when School then school(data)
else data.to_s
Thanks for all the responses. My understanding it's breaking when I try
to pass nothing as an argument to that function because you can't pass
an undefined variable as an argument.
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Hey all,
I find this in ruby guide:
resources :photos do
collection do
get 'search'
end
end
It will also create the search_photos_url and search_photos_path route
helpers.
So I try to implement:
#routes
resources :core do
collection do
get 'coreim'
get 'corer'
end
Thanks for response, it outputs this:
coreim_core_index GET/core
/coreim(.:format) {:action=coreim,
:controller=core}
corer_core_index GET/core/corer(.:format)
{:action=corer, :controller=core}
So I would expect this to work:
coreim_core_path
corer_core_path
$rake routes
coreim_cores GET/cores/coreim(.:format) {:action=coreim,
:controller=cores}
cores GET/cores(.:format) {:action=index,
:controller=cores}
ah, thanks for response. I didnt see this message on my last response.
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Hey all,
I get the following error message:
ActionView::TemplateError (class or module required for rescue clause)
in app/vie$ app/helpers/format_helper.rb:116:in `divide_numbers'
Basically I have a field in database called Student Fails and I populate
fields with data. Sometimes the value can
Frederick Cheung wrote in post #988949:
On Mar 23, 8:52pm, John Merlino li...@ruby-forum.com wrote:
params[:controller].singularize.constantize.responds_to(:viewable)
Presumably this is the line throwing the error. If params[:controller]
is users then you'll be calling
constantize
Hey all,
I'm trying to fully understand what this method in Ruby does. Basically
it passes a collection of records from the database (using the Rails
find method) into the argument list as a local variable called
resources. It assigns the local variable to an instance variable called
Suppose 90 records...
((90-1)/30).to_i + 1 = 3, 3 full pages
It's just some math hijinks to make sure any partial page isn't missed
in the page count.
Thanks that was very helpful.
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Frederick Cheung wrote in post #989266:
On 25 Mar 2011, at 16:47, John Merlino li...@ruby-forum.com wrote:
Frederick Cheung wrote in post #988949:
On Mar 23, 8:52pm, John Merlino li...@ruby-forum.com wrote:
if
params[:controller].singularize.capitalize.constantize.method_defined
Hey all,
I have a table helper. Basically I want only certain tables to have a
view link for each record. Im not sure the best way to achieve this but
the way I can up with is to check if the model contains a certain method
such as viewable and if it does, then you create the link in a table
Hey all,
layout_helper.rb:
def table(collection, header_names, fields, class_name)
return false unless collection.any?
table_str =
table_str += table id=\ + class_name + \ class=\ + class_name
+ \\n
table_str += \tthead\n
table_str += \t\ttr\n
header_names.each
Frederick Cheung wrote in post #988214:
On Mar 18, 7:06pm, John Merlino li...@ruby-forum.com wrote:
table_str += \t\ttr\n
fields.each do |name|
What the above does is render a big string of what I am wanting to
display as html markup. If I add puts(table_str) to the helper method
You're seeing the html because rails automatically escape
html for you these days. You can call html_safe on a string to mark it
as not needing escaping (although that shifts the responsibility of
checking that things are indeed safe to you )
Fred
Thanks it worked!
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Has anyone gotten devise to work at all with any kind of ajax?
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Hey all,
I am using devise. While the data successfully updates to database, it
still reports back as an error, and the below error function is
executed:
var options = {
type: 'POST',
url: /user,
dataType: 'json',
data: $('#dialog-form
I actually now hard code the create method I want to invoke:
var options = {
type: 'POST',
url: users/create,
dataType: 'json',
data: $('#sign-in form:first').serialize(),
I modified the routes to point to controller. But now I get this:
Started POST /users/create for 127.0.0.1 at 2011-03-08 14:21:21 -0500
Processing by UsersController#create as JSON
SQL (177.7ms) BEGIN
SQL (1.6ms) ROLLBACK
Rendered text template (0.0ms)
Completed 422 Unprocessable Entity
Resolved. I had to post to user model, which triggers registration
controller.
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Hey all,
I installed the devise plugin and I'm sure it's fully installed.
I have a popup where user creates an account, including email, password,
and password confirmation. When they click submit, I use jquery's .ajax
method:
$.ajax({
url: $('#dialog-form
Also you have not said what happens if you include the test checking
for no blog_images.
Colin
I think I realized what the problem was. There were four records in the
blog_posts table. At the time of the post, I only had one record in
blog_images table that linked to first record of
Thanks for replies.
This:
post.blog_images.first.image_file_name
outputs
undefined method `image_file_name' for nil:NilClass
I think that means I called a method on a class that it cannot find? I
have already established has_many belongs_to between blog_images and
posts table.
This doesn't
Hey all,
When someone is on my login page, I have this:
% form_for :user, :url = { :action = login } do |f| %
%= f.label(:user_email, User Email)%
%= f.text_field(:email) %br/
%= f.label(:user_password, User Password)%
%= f.password_field(:password) %br/
%= f.submit(Login) %
%=
and this is checking session[:user_id]. Furthermore one appears to be
storing an actual user object whereas your other piece of code seems
to be expecting there to be just an id.
Fred
You're right! Thanks.
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That means that in your chain of method calls, the thing before
image_file_name is nil. So there is no first record in the
blog_images collection... are you sure you have some associated
images?
Yes, in my database I have blog_images table with a foreign key of
blog_post_id of 1. In my
At the top of your controller, you'll want to add
helper_method :current_user
Thanks for response, but I place this in application controller:
helper_method :current_user
private
def require_login
unless logged_in?
flash[:error] = You must be logged in to access this section
Hey all,
with this below (a post has many blog_images and blog_image belongs to
post):
% @posts.each do |post| %
div class=FeatureItem
a href=img src=/images/%=
post.blog_images.image_file_name % width=220 height=174 alt=
style=top: 27px; left: 13px; /Click Here/a
div
Check rake routes. Is the route there?
Yeah, I had to use: cocoreim_cocore_index_path
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Hey all,
I have this in my plugins directory:
1: % if current_user current_user.admin? %
2: div class=blogAdminLinks
3: ul class=blogList
4: li class=blogListFirst%= link_to 'New Blog Post',
new_blog_post_path %/li
As you can see,it references current_user
So I define current_user
Hey all,
I installed blogkit as a rails plugin. It installed in the vendor
directory as an entire application. called blog_kit. This application
has a controller called blog_posts_controller. However, when I route to
blog_posts in my application:
resources :blog_posts do
resources
Hey all,
I have this in routes:
resources :cocore do
collection do
get :cocoreim
end
end
I have this in ccore controller:
class CoController ApplicationController
def index
end
def cocoreim
render 'cocoreim'
end
end
In indx.html.erb of cocore view directory, I
I ended up just commenting it out.
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Frederick Cheung wrote in post #981180:
On Feb 11, 3:36pm, John Merlino li...@ruby-forum.com wrote:
readline.c: In function username_completion_proc_call:
readline.c:730: error: username_completion_function undeclared (first
use in this function)
readline.c:730: error: (Each undeclared
Frederick Cheung wrote in post #981653:
On Feb 14, 7:51pm, John Merlino li...@ruby-forum.com wrote:
Frederick Cheung wrote in post #981180:
However, I try to create rails 2 project and got an uninviting error:
MacBook-Pro:~ jmerlino$ rails _2.3.5_ myproject
/Users/jmerlino/.rvm/rubies/ruby
Hey all,
I tried to do bundle install in my Rails 3 project and got this error:
/Users/jmerlino/.rvm/rubies/ruby-1.9.2-p136/bin/ruby extconf.rb
checking for stdio.h... yes
creating Makefile
make
gcc -I.
-I/Users/jmerlino/.rvm/rubies/ruby-1.9.2-p136/include/ruby-1.9.1/x86_64-darwin10.2.0
Frederick Cheung wrote in post #980922:
Error running 'make ', please read
/Users/jmerlino/.rvm/log/ruby-1.8.7-p330/make.log
So, what was in it?
Fred
Towards bottom it says this:
readline.c: In function ‘username_completion_proc_call’:
readline.c:730: error: ‘username_completion_function’
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