/usr/lib/ruby/1.8/ramaze/helper/sequel_form.rb is in libramaze-ruby1.8 2010.06.18-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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module Helper
module SequelForm
# Pass it an object for your ORM and options for the <form> tag
# Usage:
# sequel_form(User, :action => '/create')
# sequel_form(Tag, :action => '/find', :method => 'post')
def sequel_form(object, options = {})
Ramaze::Form.pick(object, options)
end
end
end
class Form
attr_accessor :object, :options
YEARS, MONTHS, DAYS, HOURS, MINUTES, SECONDS =
(1900..2100), (1..12), (1..31), (0..23), (0..59), (0..59)
DATE_GENERIC = [
[ :day, DAYS ],
[ :month, MONTHS ],
[ :year, YEARS ] ]
TIME_GENERIC = [
[ :day, DAYS ],
[ :month, MONTHS ],
[ :year, YEARS ],
[ :hour, HOURS ],
[ :min, MINUTES ],
[ :sec, SECONDS ] ]
# TODO:
# How _elegant_ ...
# Tries to find the right module for extending the Form instance.
# It's problematic since the boundaries of what an model instance or model
# class looks like is very fuzzy, also a problem is that the ORM may not be
# available/required.
#
# Maybe we can abstract that a bit by going through an array of procs for
# testing?
def self.pick(object, options = {})
if defined?(Sequel::Model)
if object.is_a?(Sequel::Model)
options[:layer] ||= Layer::Sequel
InstanceForm.new(object, options)
elsif object.ancestors.include?(Sequel::Model)
options[:layer] ||= Layer::Sequel
ClassForm.new(object, options)
end
else
raise "Unknown ORM for: %p" % object
end
end
# Create new instance of Form plus the layer for the ORM
def initialize(object, options = {})
@object, @options = object, options
if layer = options.delete(:layer)
extend layer
end
end
# Generate and return the final form
def to_s
out = "<form #{form_attributes}>"
out << "<fieldset>"
out << generate
out << "</fieldset>"
out << '<input type="submit" />'
out << '<input type="reset" />'
out << "</form>"
end
# Decide on the strucuture of the tag based on the hash
def field_for(hash)
return if hash[:primary_key]
args = args_for(hash)
inner =
case type = hash[:type]
when :integer
field_integer(*args)
when :boolean
field_boolean(*args)
when :text
field_textarea(*args)
when :varchar
field_input(*args)
when :date
field_date(*args)
when :time
field_time(*args)
else
Log.warn "Unknown field: %p" % hash
field_input(*args)
end
"<label>#{args.first}: </label>\n#{inner}"
end
private
# inject to attributes for the <form>
def form_attributes
options.inject([]){|s,(k,v)| s << "#{k}='#{v}'" }.join(' ')
end
# Start tag with name and attributes
def start_tag(name, hash)
hash.inject("<#{name}"){|s,(k,v)| s << " #{k}='#{v}'" }
end
# Make a closed tag with name and attributes
def closed_tag(name, hash)
start_tag(name, hash) << ' />'
end
# Textarea with attributes from hash and the value from @object
def textarea(value, hash = {})
start_tag(:textarea, hash) << ">#{value}</textarea>"
end
# <input> with optional attributes from hash
def input(hash = {})
closed_tag(:input, hash)
end
# <input type="checkbox" with optional attributes from hash.
def checkbox(hash = {})
hash[:type] = :checkbox
input(hash)
end
# <option value="value"> with optional attributes from hash
def option(value, hash = {})
start_tag(:option, hash) << ">#{value}</option>"
end
# Yield method names and values for the Date instance
def field_date_generic
DATE_GENERIC.map{|(sel, range)|
yield(sel, range).join
}.join("\n")
end
# Yield method names and values for the Time/DateTime instance
def field_time_generic
TIME_GENERIC.map{|(sel, range)|
yield(sel, range).join
}.join("\n")
end
# Here go all the layers that are extended for specific ORMs
module Layer
# Layer for Sequel, only generate needs to be implemented, may change in
# future if we abstract more for different ORMs
module Sequel
# A bit nasty, get the @columns of the object and generate its
# field_for
def generate
columns = object_class.schema.instance_variable_get('@columns')
columns.map{|hash| field_for(hash) }.flatten.join("<br />\n")
end
end
end
end
# Form for the model class itself, very similar to an empty instance.
class ClassForm < Form
# <input name="name" />
def field_input(name)
input :name => name
end
# <textarea name="name"></textarea>
def field_textarea(name)
textarea '', :name => name
end
# <input name="name" />
def field_integer(name)
input :name => name
end
# <input type="checkbox" name="name" />
def field_boolean(name)
checkbox :name => name
end
# <select> with lots of <option>s
def field_date(name)
field_date_generic{|sel, range|
[ "<select name='#{name}[#{sel}]'>",
range.map{|d| option(d, :value => d) },
"</select>" ]
}
end
# <select> with lots of <option>s
def field_time(name)
field_time_generic{|sel, range|
[ "<select name='#{name}[#{sel}]'>",
range.map{|d| option(d, :value => d) },
"</select>" ]
}
end
# picks the :name
def args_for(hash)
[ hash[:name] ]
end
# Should be that way, at least for Sequel
def object_class
@object
end
end
# Form for instances of the model class
class InstanceForm < Form
# returns <input type='text' name='name' value='value' />
def field_input(name, value)
"<input type='text' name='#{name}' value='#{value}'/>"
end
# returns <textarea name='name'>#{value}</textarea>
def field_textarea(name, value)
"<textarea name='#{name}'>#{value}</textarea>"
end
# returns <input type="text" name="name" value="value" />
def field_integer(name, value)
field_input(name, value)
end
# <input type="checkbox" ...
def field_boolean(name, value)
if value
checkbox :name => name, :value => value, :checked => :checked
else
checkbox :name => name, :value => value
end
end
def field_date(name, value)
field_date_generic do |sel, range|
[ "<select name='#{name}[#{sel}]'>",
option_range_selected(range, value.send(sel)),
"</select>" ]
end
end
def field_time(name, value)
field_time_generic do |sel, range|
[ "<select name='#{name}[#{sel}]'>",
option_range_selected(range, value.send(sel)),
"</select>" ]
end
end
def option_range_selected(range, value)
range.map do |r|
if r == value
option(r, :value => r, :selected => :selected)
else
option(r, :value => r)
end
end
end
def args_for(hash)
name = hash[:name]
[ name, @object.send(name) ]
end
# Class for @object, atm Sequel specific?
def object_class
@object.class
end
end
end
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