Class: Seamless::Model

Inherits:
ActiveRecord::Base show all
Defined in:
lib/seamless/model.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from ActiveRecord::Base

#to_json

Class Method Details

.find_by_sql(*args) ⇒ Object 



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# File 'lib/seamless/model.rb', line 37

def find_by_sql(*args)

	return super(args) if not defined?(Cache)
	return super(args) unless CachedModel.use_memcache? or CachedModel.use_local_cache?
		
	# don't cache result of :all
	return super(args) if args.first =~ /^SELECT \* FROM #{table_name}$/
	
	# don't do more complex finds
	case args.first
		when Array then
			return super(args)
		end
		
	# some SQL ends with space
	sql = args.first.chomp!(" ")
	log "SQL: #{sql}"
		
	if @model_regex==nil
		@model_regex = /^SELECT \* FROM #{table_name} WHERE \(#{table_name}\.`#{primary_key}` = (\d+)\)$/
	end
	
	# see if this is a single query for the primary key
	match = @model_regex.match(sql)
	pk = nil
	
	if match
		# extract the primary key
		pk = match[1]	
		
		# check to see if the record is in the DB with PK
		if CachedModel.use_memcache?
			result = Cache.get "#{name}:id:#{pk}"
			if result
				log "cache hit: #{name}.#{primary_key} -> #{pk}"
				result.instance_variable_set(:@new_record,false)
				return [result]
			else
				log "cache miss: #{name}.#{primary_key} -> #{pk}"
			end
		end
	end
	
	records = super(args)
	
	if CachedModel.use_memcache?
		# store in cache
		if pk
			Cache.put "#{name}:id:#{pk}", records.first, CachedModel.ttl
			log "cache set: #{name}.#{primary_key} -> #{pk}"
		end
	end
	
	records
end

.log(msg) ⇒ Object 



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# File 'lib/seamless/model.rb', line 31

def log(msg)
	if logger && logger.level == Logger::DEBUG
		logger.add(Logger::DEBUG, "Seamless::Model - #{msg}")
	end
end

.models ⇒ Object 



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# File 'lib/seamless/model.rb', line 9

def Model.models
	SEAMLESS_MODELS
end

Instance Method Details

#destroy ⇒ Object 



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# File 'lib/seamless/model.rb', line 18

def destroy
	super
	delete_cache if defined?(Cache)
end

#update ⇒ Object 



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# File 'lib/seamless/model.rb', line 13

def update
	super
	delete_cache if defined?(Cache)
end