Class: ReactiveRecord::ServerDataCache::CacheItem
- Defined in:
- lib/reactive_record/server_data_cache.rb
Instance Attribute Summary collapse
-
#absolute_vector ⇒ Object
readonly
Returns the value of attribute absolute_vector.
-
#acting_user ⇒ Object
readonly
Returns the value of attribute acting_user.
-
#root ⇒ Object
readonly
Returns the value of attribute root.
-
#vector ⇒ Object
readonly
Returns the value of attribute vector.
Class Method Summary collapse
Instance Method Summary collapse
- #aggregation?(method) ⇒ Boolean
- #apply_method(method) ⇒ Object
- #apply_method_to_cache(method) ⇒ Object
- #apply_star ⇒ Object
- #as_hash(children = nil) ⇒ Object
-
#build_new_cache_item(new_value, method, absolute_method) ⇒ Object
TODO replace instance_eval with a method like clone_new_child(.…).
-
#initialize(db_cache, acting_user, klass, preloaded_records) ⇒ CacheItem
constructor
A new instance of CacheItem.
- #jsonize(method) ⇒ Object
- #merge_inheritance_column(children) ⇒ Object
- #method ⇒ Object
- #start_timing(&block) ⇒ Object
- #timing(tag, &block) ⇒ Object
- #to_json ⇒ Object
- #value ⇒ Object
Constructor Details
#initialize(db_cache, acting_user, klass, preloaded_records) ⇒ CacheItem
Returns a new instance of CacheItem.
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# File 'lib/reactive_record/server_data_cache.rb', line 221 def initialize(db_cache, acting_user, klass, preloaded_records) @db_cache = db_cache @acting_user = acting_user @vector = @absolute_vector = [klass] @value = klass @parent = nil @root = self @preloaded_records = preloaded_records @db_cache.add_item_to_cache self end |
Instance Attribute Details
#absolute_vector ⇒ Object (readonly)
Returns the value of attribute absolute_vector.
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# File 'lib/reactive_record/server_data_cache.rb', line 201 def absolute_vector @absolute_vector end |
#acting_user ⇒ Object (readonly)
Returns the value of attribute acting_user.
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# File 'lib/reactive_record/server_data_cache.rb', line 203 def acting_user @acting_user end |
#root ⇒ Object (readonly)
Returns the value of attribute root.
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# File 'lib/reactive_record/server_data_cache.rb', line 202 def root @root end |
#vector ⇒ Object (readonly)
Returns the value of attribute vector.
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# File 'lib/reactive_record/server_data_cache.rb', line 200 def vector @vector end |
Class Method Details
.new(db_cache, acting_user, klass, preloaded_records) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 213 def self.new(db_cache, acting_user, klass, preloaded_records) klass = ServerDataCache.get_model(klass) if existing = ServerDataCache.timing(:root_lookup) { db_cache.cache.detect { |cached_item| cached_item.vector == [klass] } } return existing end super end |
Instance Method Details
#aggregation?(method) ⇒ Boolean
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# File 'lib/reactive_record/server_data_cache.rb', line 289 def aggregation?(method) if method.is_a?(String) && @value.class.respond_to?(:reflect_on_aggregation) aggregation = @value.class.reflect_on_aggregation(method.to_sym) if aggregation && !(aggregation.klass < ActiveRecord::Base) && @value.send(method) aggregation end end end |
#apply_method(method) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 328 def apply_method(method) if method.is_a? Array and method.first == "find_by_id" method[0] = "find" elsif method.is_a? String and method =~ /^\*[0-9]+$/ method = "*" end new_vector = vector + [method] timing('apply_method lookup') { @db_cache.cache_reps[new_vector] } || apply_method_to_cache(method) end |
#apply_method_to_cache(method) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 240 def apply_method_to_cache(method) @db_cache.cache.inject(nil) do |representative, cache_item| if cache_item.vector == vector if method == "*" # apply_star does the security check if value is present cache_item.apply_star || representative elsif method == "*all" # if we secure the collection then we assume its okay to read the ids secured_value = cache_item.value.__secure_collection_check(@acting_user) cache_item.build_new_cache_item(timing(:active_record) { secured_value.collect { |record| record.id } }, method, method) elsif method == "*count" secured_value = cache_item.value.__secure_collection_check(@acting_user) cache_item.build_new_cache_item(timing(:active_record) { cache_item.value.__secure_collection_check(@acting_user).count }, method, method) elsif preloaded_value = @preloaded_records[cache_item.absolute_vector + [method]] # no security check needed since we already evaluated this cache_item.build_new_cache_item(preloaded_value, method, method) elsif aggregation = cache_item.aggregation?(method) # aggregations are not protected cache_item.build_new_cache_item(aggregation.mapping.collect { |attribute, accessor| cache_item.value[attribute] }, method, method) else if !cache_item.value || cache_item.value.is_a?(Array) # seeing as we just returning representative, no check is needed (its already checked) representative else begin secured_method = "__secure_remote_access_to_#{[*method].first}" # order is important. This check must be first since scopes can have same name as attributes! if cache_item.value.respond_to? secured_method cache_item.build_new_cache_item(timing(:active_record) { cache_item.value.send(secured_method, cache_item.value, @acting_user, *([*method][1..-1])) }, method, method) elsif (cache_item.value.class < ActiveRecord::Base) && cache_item.value.attributes.has_key?(method) # TODO: second check is not needed, its built into check_permmissions, check should be does class respond to check_permissions... cache_item.value.(@acting_user, :view_permitted?, method) cache_item.build_new_cache_item(timing(:active_record) { cache_item.value.send(*method) }, method, method) else raise "method missing" end rescue Exception => e # this check may no longer be needed as we are quite explicit now on which methods we apply # ReactiveRecord::Pry::rescued(e) ::Rails.logger.debug "\033[0;31;1mERROR: HyperModel exception caught when applying #{method} to db object #{cache_item.value}: #{e}\033[0;30;21m" raise e, "HyperModel fetching records failed, exception caught when applying #{method} to db object #{cache_item.value}: #{e}", e.backtrace end end end else representative end end end |
#apply_star ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 298 def apply_star if @value && @value.__secure_collection_check(@acting_user) && @value.length > 0 i = -1 @value.inject(nil) do |representative, current_value| i += 1 if preloaded_value = @preloaded_records[@absolute_vector + ["*#{i}"]] build_new_cache_item(preloaded_value, "*", "*#{i}") else build_new_cache_item(current_value, "*", "*#{i}") end end else build_new_cache_item([], "*", "*") end end |
#as_hash(children = nil) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 352 def as_hash(children = nil) unless children return {} if @value.is_a?(Class) && (@value < ActiveRecord::Base) children = [@value.is_a?(BigDecimal) ? @value.to_f : @value] end if @parent if method == "*" if @value.is_a? Array # this happens when a scope is empty there is test case, but @parent.as_hash({}) # does it work for all edge cases? else @parent.as_hash({@value.id => children}) end elsif (@value.class < ActiveRecord::Base) && children.is_a?(Hash) id = method.is_a?(Array) && method.first == "new" ? [nil] : [@value.id] # c = children.merge(id: id) # if @value.attributes.key? @value.class.inheritance_column # c[@value.class.inheritance_column] = [@value[@value.class.inheritance_column]] # end @parent.as_hash(jsonize(method) => merge_inheritance_column(children.merge(id: id))) elsif method == '*all' @parent.as_hash('*all' => children.first) else @parent.as_hash(jsonize(method) => children) end else { method.name => children } end end |
#build_new_cache_item(new_value, method, absolute_method) ⇒ Object
TODO replace instance_eval with a method like clone_new_child(.…)
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# File 'lib/reactive_record/server_data_cache.rb', line 315 def build_new_cache_item(new_value, method, absolute_method) new_parent = self self.clone.instance_eval do @vector = @vector + [method] # don't push it on since you need a new vector! @absolute_vector = @absolute_vector + [absolute_method] @value = new_value @db_cache.add_item_to_cache self @parent = new_parent @root = new_parent.root self end end |
#jsonize(method) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 338 def jsonize(method) # sadly standard json converts {[:foo, nil] => 123} to {"['foo', nil]": 123} # luckily [:foo, nil] does convert correctly # so we check the methods and force proper conversion method.is_a?(Array) ? method.to_json : method end |
#merge_inheritance_column(children) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 345 def merge_inheritance_column(children) if @value.attributes.key? @value.class.inheritance_column children[@value.class.inheritance_column] = [@value[@value.class.inheritance_column]] end children end |
#method ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 209 def method @vector.last end |
#start_timing(&block) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 232 def start_timing(&block) ServerDataCache.class.start_timing(&block) end |
#timing(tag, &block) ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 236 def timing(tag, &block) ServerDataCache.timing(tag, &block) end |
#to_json ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 381 def to_json @value.to_json end |
#value ⇒ Object
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# File 'lib/reactive_record/server_data_cache.rb', line 205 def value @value # which is a ActiveRecord object end |