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ruby variable inside sql statement


ruby variable inside sql statement

By : Darwin Ferrer Soluta
Date : November 18 2020, 01:01 AM
will be helpful for those in need I am trying to use a ruby variable inside an sql statement. The following code works and deletes the second record of the templates table. How do i replace this number with my user defined variable "deleteid"? , You can use string interpolation:
code :
$db.execute %{DELETE FROM templates WHERE id = #{deleteid}}

$db.execute %Q{DELETE FROM templates WHERE id = #{deleteid}}
$db.prepare(%q{DELETE FROM templates WHERE id = ?}, [deleteid])
$db.exec_params(%q{DELETE FROM templates WHERE id = $1}, [deleteid])


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Ruby/Rails: accessing a variable inside a .each on my instance variable array causing Ruby interpreter to crash

Ruby/Rails: accessing a variable inside a .each on my instance variable array causing Ruby interpreter to crash


By : Cheque
Date : March 29 2020, 07:55 AM
Any of those help I've written a mixin (based on something I read in a blog) that seems to be causing a problem , If you remove:
code :
def method_missing(meth, *args, &blk)
  customer.send(meth, *args, &blk)
rescue NoMethodError
  super
end
def method_missing(meth, *args, &blk)
  user.send(meth, *args, &blk)
rescue NoMethodError
  super
end
Why does Ruby seem to hoist variable declarations from inside a case statement even if that code path is not executed?

Why does Ruby seem to hoist variable declarations from inside a case statement even if that code path is not executed?


By : Anlinvia
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further
When the Ruby parser sees the sequence identifier, equal-sign, value, as in this expression
code :
x = 1
if false
  x = 1
end
p x # Output: nil
p y # Fatal Error: y is unknown
Ruby variable scope: access rack.env from inside an existing ruby class?

Ruby variable scope: access rack.env from inside an existing ruby class?


By : krrs
Date : March 29 2020, 07:55 AM
Hope that helps Personally, I think having a variable that changes like that inside a class method is asking for trouble, it breaks the Law of Demeter by reaching across boundaries. Instead, I'd wrap it in a Sinatra helper which then passes the second argument by default.
code :
helpers do
  def find( s )
    Repository.find( s, env['org'] )
  end
end
++ variable doesnt work inside if statement inside if statement

++ variable doesnt work inside if statement inside if statement


By : Angus Perkerson
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further I understand you're trying to print the number of days the temperature is above 20, and you want the condition of -100 to execute right after the last Console.WriteLine so, in order to achieve that you'll have to set the do while loop condition to include your -100 condition as the following:
code :
int degrees;
do
{
    int above20Count = 0;

    Console.WriteLine("Enter the temperature");
    degrees = int.Parse(Console.ReadLine());

    if (degrees > 20)
    {
        above20Count++;
    }

    Console.WriteLine("Number of days above 20 degrees: " + above20Count);

} while (degrees == -100);
ruby method : If statement inside an if statement

ruby method : If statement inside an if statement


By : Joshua Timmerman
Date : March 29 2020, 07:55 AM
hope this fix your issue With a text editor that supports auto-reindentation, your code looks like this:
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