You can specify formal arguments in rake by adding symbol arguments to the task call. For example:
require 'rake'
task :my_task, [:arg1, :arg2] do |t, args|
puts "Args were: #{args} of class #{args.class}"
puts "arg1 was: '#{args[:arg1]}' of class #{args[:arg1].class}"
puts "arg2 was: '#{args[:arg2]}' of class #{args[:arg2].class}"
end
task :invoke_my_task do
Rake.application.invoke_task("my_task[1, 2]")
end
# or if you prefer this syntax...
task :invoke_my_task_2 do
Rake::Task[:my_task].invoke(3, 4)
end
# a task with prerequisites passes its
# arguments to it prerequisites
task :with_prerequisite, [:arg1, :arg2] => :my_task #<- name of prerequisite task
# to specify default values,
# we take advantage of args being a Rake::TaskArguments object
task :with_defaults, :arg1, :arg2 do |t, args|
args.with_defaults(:arg1 => :default_1, :arg2 => :default_2)
puts "Args with defaults were: #{args}"
end
Then, from the command line:
> rake my_task[1,false]
Args were: {:arg1=>"1", :arg2=>"false"} of class Rake::TaskArguments
arg1 was: '1' of class String
arg2 was: 'false' of class String
> rake "my_task[1, 2]"
Args were: {:arg1=>"1", :arg2=>"2"}
> rake invoke_my_task
Args were: {:arg1=>"1", :arg2=>"2"}
> rake invoke_my_task_2
Args were: {:arg1=>3, :arg2=>4}
> rake with_prerequisite[5,6]
Args were: {:arg1=>"5", :arg2=>"6"}
> rake with_defaults
Args with defaults were: {:arg1=>:default_1, :arg2=>:default_2}
> rake with_defaults['x','y']
Args with defaults were: {:arg1=>"x", :arg2=>"y"}
As demonstrated in the second example, if you want to use spaces, the quotes around the target name are necessary to keep the shell from splitting up the arguments at the space.
Looking at the code in rake.rb, it appears that rake does not parse task strings to extract arguments for prerequisites, so you can't do task :t1 => "dep[1,2]"
. The only way to specify different arguments for a prerequisite would be to invoke it explicitly within the dependent task action, as in :invoke_my_task
and :invoke_my_task_2
.
Note that some shells (like zsh) require you to escape the brackets: rake my_task\['arg1'\]
your form probably has fixture[home_team]
which is a select which passes the team.id
so when you do
@fixture = Fixture.new(params[:fixture])
@fixture.save
you are calling home_team= team.id
team.id is a string but home_team should be a Team object
Best Answer
Run the following command
where
<version>
is the version number of your migration file you want to revert.eg. if you want to revert a migration with file name 3846656238_create_users.rb