110 lines
3.3 KiB
Ruby
110 lines
3.3 KiB
Ruby
require 'active_support/concern'
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require 'active_support/core_ext/class/attribute'
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module AbstractController
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class DoubleRenderError < Error
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DEFAULT_MESSAGE = "Render and/or redirect were called multiple times in this action. Please note that you may only call render OR redirect, and at most once per action. Also note that neither redirect nor render terminate execution of the action, so if you want to exit an action after redirecting, you need to do something like \"redirect_to(...) and return\"."
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def initialize(message = nil)
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super(message || DEFAULT_MESSAGE)
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end
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end
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class UnsupportedOperationError < Error
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DEFAULT_MESSAGE = "Unsupported render operation. BasicRendering supports only :text and :nothing options. For more, you need to include ActionView."
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def initialize
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super DEFAULT_MESSAGE
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end
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end
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module Rendering
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extend ActiveSupport::Concern
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included do
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class_attribute :protected_instance_variables
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self.protected_instance_variables = []
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end
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# Normalize arguments, options and then delegates render_to_body and
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# sticks the result in self.response_body.
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# :api: public
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def render(*args, &block)
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options = _normalize_render(*args, &block)
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self.response_body = render_to_body(options)
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end
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# Raw rendering of a template to a string.
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#
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# It is similar to render, except that it does not
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# set the response_body and it should be guaranteed
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# to always return a string.
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#
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# If a component extends the semantics of response_body
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# (as Action Controller extends it to be anything that
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# responds to the method each), this method needs to be
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# overridden in order to still return a string.
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# :api: plugin
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def render_to_string(*args, &block)
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options = _normalize_render(*args, &block)
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render_to_body(options)
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end
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# Performs the actual template rendering.
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# :api: public
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def render_to_body(options = {})
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raise UnsupportedOperationError
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end
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# Return Content-Type of rendered content
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# :api: public
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def rendered_format
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Mime::TEXT
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end
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DEFAULT_PROTECTED_INSTANCE_VARIABLES = %w(
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@_action_name @_response_body @_formats @_prefixes @_config
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@_view_context_class @_view_renderer @_lookup_context
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)
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# This method should return a hash with assigns.
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# You can overwrite this configuration per controller.
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# :api: public
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def view_assigns
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hash = {}
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variables = instance_variables
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variables -= protected_instance_variables
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variables -= DEFAULT_PROTECTED_INSTANCE_VARIABLES
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variables.each { |name| hash[name[1..-1]] = instance_variable_get(name) }
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hash
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end
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# Normalize args by converting render "foo" to render :action => "foo" and
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# render "foo/bar" to render :file => "foo/bar".
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# :api: plugin
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def _normalize_args(action=nil, options={})
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options
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end
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# Normalize options.
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# :api: plugin
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def _normalize_options(options)
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options
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end
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# Process extra options.
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# :api: plugin
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def _process_options(options)
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options
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end
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# Normalize args and options.
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# :api: private
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def _normalize_render(*args, &block)
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options = _normalize_args(*args, &block)
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_normalize_options(options)
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options
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end
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end
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end
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