The problem is that [`Kernel#gets`][1] (which is what you&#39;re calling if you just use `gets` by itself) assumes you&#39;re pulling from a file named by the arguments passed to Rake.  That means `gets` tries to return the content of a file called [rake-task-here], which almost certainly doesn&#39;t exist.

Try [`STDIN.gets`][2].


  [1]: http://ruby-doc.org/core-2.0/Kernel.html#method-i-gets
  [2]: http://ruby-doc.org/core-2.0/IO.html#method-i-gets

I don&#39;t think that you should be using gets in a rake task, if you need to get input from the command line you probably should pass it in as a parameter, but if you post some code that is not working then I am sure you will get a better answer.

I have  a form that inherits from 2 other forms. In my form, I want to change the label of a field that was defined in one of the parent forms. Does anyone know how this can be done?

I&#39;m trying to do it in my `__init__`, but it throws an error saying that &quot;&#39;RegistrationFormTOS&#39; object has no attribute &#39;email&#39;&quot;. Does anyone know how I can do this?

Thanks.

Here is my form code:

    from django import forms
    from django.utils.translation import ugettext_lazy as _
    from registration.forms import RegistrationFormUniqueEmail
    from registration.forms import RegistrationFormTermsOfService
    
    attrs_dict = { &#39;class&#39;: &#39;required&#39; }
    
    class RegistrationFormTOS(RegistrationFormUniqueEmail, RegistrationFormTermsOfService):
    	&quot;&quot;&quot;
    	Subclass of ``RegistrationForm`` which adds a required checkbox
    	for agreeing to a site&#39;s Terms of Service.
    	
    	&quot;&quot;&quot;
    	email2 = forms.EmailField(widget=forms.TextInput(attrs=dict(attrs_dict, maxlength=75)), label=_(u&#39;verify email address&#39;))
    	
    	def __init__(self, *args, **kwargs):
    		self.email.label = &quot;New Email Label&quot;
    		super(RegistrationFormTOS, self).__init__(*args, **kwargs)
    
    	def clean_email2(self):
    		&quot;&quot;&quot;
    		Verifiy that the values entered into the two email fields
    		match. 
    		&quot;&quot;&quot;
    		if &#39;email&#39; in self.cleaned_data and &#39;email2&#39; in self.cleaned_data:
    			if self.cleaned_data[&#39;email&#39;] != self.cleaned_data[&#39;email2&#39;]:
    				raise forms.ValidationError(_(u&#39;You must type the same email each time&#39;))
    		return self.cleaned_data



Django form - set label

Can I change effective process name of a Python script? I want to show a different name instead of the real name of the process when I get the system process list. In C I can set

    strcpy(argv[0],&quot;othername&quot;);

But in Python 

    argv[0] = &quot;othername&quot;

doesn&#39;t seem to work. When i get process list (with `ps ax` in my linux box) the real name doesn&#39;t change. I prefer a portable solution (or else one solution for posix and another for windows environments), if it exists.

Thanks in advance

Is there a way to change effective process name in Python?

I get an error whenever I try to use the function gets within a rake task. Is there a way to make it work?

The error says, &quot;no such file or directory - (rake task name)&quot;

How do I use &quot;gets&quot; on a rake task?

<p>I get an error whenever I try to use the function gets within a rake task. Is there a way to make it work?</p>
<p>The error says, "no such file or directory - (rake task name)"</p>


What is the best web server for ruby on rails application? Why?

What is the best web server for Ruby on Rails application?

The will_paginate gem is broken on my version of Oracle. The default `paginate_by_sql` method in the WillPaginate module is inserting an extra &#39;AS&#39; into a query and causing it to fail.

The code itself is easily fixed, but I&#39;m not sure of the best way to get Rails to pick up my change.

I don&#39;t want to change the code in the gem itself, as that will leave my code broken on other machines.

I tried creating an lib/test.rb file containing:

    module WillPaginate
      def paginate_by_sql
        (my code goes here)
      end
    end

and requiring it from environment.rb, but it&#39;s not picking up my changes.
I also tried requiring it from controllers/application.rb, but again, not picking up my changes.

Temporarily, I got it to work by overriding the method within the specific model itself, but this is a bit of a hack, and means I can&#39;t use it on any of the other models in this project.

I&#39;m sure there&#39;s an easy way to do this, but I&#39;m not having any luck tracking it down using Google.

Overriding a module method from a gem in Rails

I&#39;m trying to optimize some of the database queries in my Rails app and I have several that have got me stumped.  They are all using an `IN` in the `WHERE` clause and are all doing full table scans even though an appropriate index appears to be in place.

For example:

    SELECT `user_metrics`.* FROM `user_metrics` WHERE (`user_metrics`.user_id IN (N,N,N,N,N,N,N,N,N,N,N,N))

performs a full table scan and `EXPLAIN` says:

    select_type: simple
    type: all
    extra: using where
    possible_keys: index_user_metrics_on_user_id  (which is an index on the user_id column)
    key: (none)
    key_length: (none)
    ref: (none)
    rows: 208

Are indexes not used when an `IN` statement is used or do I need to do something differently?  The queries here are being generated by Rails so I could revisit how my relationships are defined, but I thought I&#39;d start with potential fixes at the DB level first.

MySQL not using indexes with WHERE IN clause?

For *ad hoc* Rails tasks we have a few implementation alternatives, chief among which would seem to be:

    script/runner some_useful_thing

and:

    rake some:other_useful_thing

Which option should I prefer? If there&#39;s a clear favourite then when, if ever, should I consider using the other? If never, then why would you suppose it&#39;s still present in the framework without deprecation warnings?


I have a Rails task: should I use script/runner or rake?

I need to create one config option for my Rails application. It can be the same for all environments. I found that if I set it in `environment.rb`, it&#39;s available in my views, which is exactly what I want...

    environment.rb

    AUDIOCAST_URI_FORMAT = http://blablalba/blabbitybla/yadda

Works great.

However, I&#39;m a little uneasy. Is this a good way to do it? Is there a way that&#39;s more hip?

Best way to create custom config options for my Rails app?

In the documentation I read:

&gt; Use \A and \z to match the start and end of the string, ^ and $ match the start/end of a line.

I am going to apply a regular expression to check username (or e-mail is the same) submitted by user. Which expression should I use with `validates_format_of` in model? I can&#39;t understand the difference: I&#39;ve always used ^ and $ ...

Difference between \A \z and ^ $ in Ruby regular expressions

I have a Rakefile that compiles the project in two ways, according to the global variable `$build_type`, which can be `:debug` or `:release` (the results go in separate directories):

    task :build =&gt; [:some_other_tasks] do
    end

I wish to create a task that compiles the project with both configurations in turn, something like this:

    task :build_all do
      [ :debug, :release ].each do |t|
        $build_type = t
        # call task :build with all the tasks it depends on (?)
      end
    end

Is there a way to call a task as if it were a method?  Or how can I achieve anything similar?

How to run Rake tasks from within Rake tasks?

In python, a module doesn&#39;t *have* to have a main function, but it is common practice to use the following idiom:

    def my_main_function():
        ... # some code

    if __name__==&quot;__main__&quot;:  # program&#39;s entry point
        my_main_function()

I know Ruby doesn&#39;t *have* to have a `main` method either, but is there some sort of best practice I should follow?  Should I name my method `main` or something?

The [Wikipedia page about main methods][1] doesn&#39;t really help me.

----------
As a side-note, I have also seen the following idiom in python:

    def my_main_function(args=[]):
        ... # some code

    if __name__==&quot;__main__&quot;:  # program&#39;s entry point
        import sys
        sys.exit(my_main_function(sys.argv))

  [1]: http://en.wikipedia.org/wiki/Main_function_(programming)#Ruby

Should I define a main method in my ruby scripts?

I don&#39;t know how to create a ruby method that accepts a hash of parameters. I mean, in Rails I&#39;d like to use a method like this:

    login_success :msg =&gt; &quot;Success!&quot;, :gotourl =&gt; user_url

What is the prototype of a method that accepts this kind of parameters? How do I read them?

Create a ruby method that accepts a hash of parameters

In simple terms, what does Rake do? What purposes does it have? I understand it&#39;s a build tool but I&#39;m looking a bit more detail.

What exactly is Rake?

I have a rake task that needs to insert a value into multiple databases.  

I&#39;d like to pass this value into the rake task from the command line, or from *another* rake task.

How can I do this?

How to pass command line arguments to a rake task

I know you can view all possible rake tasks by typing

    rake -T

But I need to know what exactly a task does.  From the output, how can I find a source file that actually has the task?  For example, I&#39;m trying to find the source for the db:schema:dump task.

Content Type	Original Author	Original Content on Stackoverflow
Question	foo	View Question on Stackoverflow
Solution 1 - Ruby on-Rails	James A. Rosen	View Answer on Stackoverflow
Solution 2 - Ruby on-Rails	nitecoder	View Answer on Stackoverflow

How do I use "gets" on a rake task?

Ruby on-Rails Problem Overview

Ruby on-Rails Solutions

Solution 1 - Ruby on-Rails

Solution 2 - Ruby on-Rails

Is there a way to change effective process name in Python?

Django form - set label

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