See the blue info box here: By default dynamic segments don’t accept dots – this is because the dot is used as a separator for formatted routes. If you need to use a dot within a dynamic segment add a constraint which overrides this – for example :id => /[^\/]+/ allows anything except a slash. … Read more
You’re misreading the docs slightly. some_firm.client.new is creating a new Client object from the clients collection, and so it can automatically set the firm_id to some_firm.id, whereas the docs are calling Client.new which has no knowledge of any Firm’s id at all, so it needs the firm_id passed to it. The only difference between some_firm.clients.new … Read more
You should read that, it’s still valid. You’ll adapt the function you use depending on your needs. Basically: if you already load all entries, say User.all, then you should use length to avoid another db query if you haven’t anything loaded, use count to make a count query on your db if you don’t want … Read more
Use rand(range) From Ruby Random Numbers: If you needed a random integer to simulate a roll of a six-sided die, you’d use: 1 + rand(6). A roll in craps could be simulated with 2 + rand(6) + rand(6). Finally, if you just need a random float, just call rand with no arguments. As Marc-André Lafortune … Read more
Installing a javascript runtime library such as nodejs solves this To install nodejs on ubuntu, you can type the following command in the terminal: sudo apt-get install nodejs To install nodejs on systems using yum, type the following in the terminal: yum -y install nodejs
You have invalid YAML code somewhere. I mean invalid for Psych (the new ruby YAML parser). If you cannot (or don’t want to) fix your YAML code, try to load the old YAML parser (syck), adding this at the beginning of config/boot.rb require ‘yaml’ YAML::ENGINE.yamler=”syck” It’s just a ‘quick and dirty’ fix, I know
I think the route for signing out is a DELETE method. This means that your sign out link needs to look like this: <%= link_to “Sign out”, destroy_user_session_path, :method => :delete %> Yours doesn’t include the :method => :delete part. Also, please note that for this to work you must also include <%= javascript_include_tag :defaults … Read more
rename_column :table, :old_column, :new_column You’ll probably want to create a separate migration to do this. (Rename FixColumnName as you will.): script/generate migration FixColumnName # creates db/migrate/xxxxxxxxxx_fix_column_name.rb Then edit the migration to do your will: # db/migrate/xxxxxxxxxx_fix_column_name.rb class FixColumnName < ActiveRecord::Migration def self.up rename_column :table_name, :old_column, :new_column end def self.down # rename back if you need … Read more
The general convention is to use do..end for multi-line blocks and curly braces for single line blocks, but there is also a difference between the two that can be illustrated with this example: puts [1,2,3].map{ |k| k+1 } 2 3 4 => nil puts [1,2,3].map do |k| k+1; end #<Enumerator:0x0000010a06d140> => nil This means that … Read more
There are two variants of IN expressions: expression IN (subquery) expression IN (value [, …]) Similarly, two variants with the ANY construct: expression operator ANY (subquery) expression operator ANY (array expression) A subquery works for either technique, but for the second form of each, IN expects a list of values (as defined in standard SQL) … Read more