Module: Bogo::Lazy::ClassMethods
- Defined in:
- lib/bogo/lazy.rb
Overview
Class methods for laziness
Instance Method Summary collapse
-
#always_clean! ⇒ Object
Disable dirty state.
-
#attribute(name, type, options = {}) ⇒ nil
Add new attributes to class.
-
#attributes(*args) ⇒ Array<Hash>
Return attributes.
-
#on_missing(param = nil) ⇒ Symbol
Instance method to call on missing attribute or object to call method on if set.
-
#set_attributes(attrs) ⇒ TrueClass
Directly set attribute hash.
Instance Method Details
#always_clean! ⇒ Object
Disable dirty state
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# File 'lib/bogo/lazy.rb', line 107 def always_clean! self.class_eval do def dirty?(*args); false; end def valid_state; self; end alias_method :dirty, :data alias_method :attributes, :data end end |
#attribute(name, type, options = {}) ⇒ nil
Add new attributes to class
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# File 'lib/bogo/lazy.rb', line 125 def attribute(name, type, ={}) name = name.to_sym = .to_smash attributes[name] = Smash.new(:type => type).merge() coerce = attributes[name][:coerce] valid_types = [attributes[name][:type], NilClass].flatten.compact allowed_values = attributes[name][:allowed] multiple_values = attributes[name][:multiple] depends_on = attributes[name][:depends] define_method(name) do send(depends_on) if depends_on self.class.on_missing(self) unless data.has_key?(name) || dirty.has_key?(name) if(dirty.has_key?(name)) dirty[name] else if(data.has_key?(name)) val = data[name] else val = self.class.attributes[name][:default] end if(val.respond_to?(:dup)) begin val = val.dup rescue val end end if(val.respond_to?(:freeze)) val.freeze else val end end end define_method("#{name}=") do |val| values = multiple_values && val.is_a?(Array) ? val : [val] values.map! do |item| valid_type = valid_types.detect do |klass| item.is_a?(klass) end if(coerce && !valid_type) item = coerce.arity == 2 ? coerce.call(item, self) : coerce.call(item) if(item.is_a?(Hash) && item[:bogo_multiple]) item = item[:bogo_multiple] else item = [item] end else item = [item] end invalid_type = item.detect do |_item| valid_types.none? do |klass| _item.is_a?(klass) end end if(invalid_type) raise TypeError.new("Invalid type for `#{name}` (#{invalid_type} <#{invalid_type.class}>). Valid - #{valid_types.map(&:to_s).join(',')}") end if(allowed_values) unallowed = item.detect do |_item| !allowed_values.include?(_item) end if(unallowed) raise ArgumentError.new("Invalid value provided for `#{name}` (#{unallowed.inspect}). Allowed - #{allowed_values.map(&:inspect).join(', ')}") end end item end values.flatten!(1) if(!multiple_values && !val.is_a?(Array)) dirty[name] = values.first else dirty[name] = values end end define_method("#{name}?") do send(depends_on) if depends_on self.class.on_missing(self) unless data.has_key?(name) !!data[name] end nil end |
#attributes(*args) ⇒ Array<Hash>
Return attributes
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# File 'lib/bogo/lazy.rb', line 212 def attributes(*args) @attributes ||= Smash.new if(args.include?(:required)) Smash[@attributes.find_all{|k,v| v[:required]}] elsif(args.include?(:optional)) Smash[@attributes.find_all{|k,v| !v[:required]}] else @attributes end end |
#on_missing(param = nil) ⇒ Symbol
Instance method to call on missing attribute or object to call method on if set
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# File 'lib/bogo/lazy.rb', line 228 def on_missing(param=nil) if(param) if(param.is_a?(Symbol)) @missing_method = param else if(@missing_method && !@calling_on_missing) @calling_on_missing = true begin param.send(@missing_method) ensure @calling_on_missing = false end end @missing_method end else @missing_method end end |
#set_attributes(attrs) ⇒ TrueClass
TODO:
need deep dup here
Directly set attribute hash
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# File 'lib/bogo/lazy.rb', line 253 def set_attributes(attrs) @attributes = attrs.to_smash true end |