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Contents
module Edgarj
# Search condition
#
# Abstract class to SearchForm and SearchPopup to provide common method
# 'conditions'.
#
# 'Search' instance will be stored in view_status.model.
#
# \@errors will be used for error_messages_for helper in search-form.
class Search
# required at 'form_for' helper
extend ActiveModel::Naming
extend ActiveModel::Conversion
# include ActiveModel::Conversion ??
include ActiveModel::Validations
# to support 'human_attribute_name'
extend ActiveModel::Translation
# cache the map: column name -> column type
#
# SearchForm instance is serialized to be stored at session so that
# another class (=Cache) is introduced to store cache information.
class Cache
include Singleton
attr_accessor :klass_hash, :hit, :miss
def initialize
@klass_hash = {}
# for cache statistics
@hit = 0
@miss = 0
end
# report hit rate
def klass_hash_report
sprintf("%d/%d", @hit, @hit + @miss)
end
end
attr_accessor :errors, :_klass_str
def initialize(klass)
@errors = ActiveModel::Errors.new(self)
@_klass_str = klass.to_s
end
# generate search-conditions from ActiveRecord attributes
#
# === RETURN
# [condition_string, value_array]:: values for :conditions option on model
def conditions
raise "Not implemented"
end
def persisted?
false
end
private
# cache column type
def column_type(col_name)
cache = Cache.instance
cache.klass_hash[@_klass_str] ||= {}
if v = cache.klass_hash[@_klass_str][col_name.to_s]
cache.hit += 1
v
else
cache.miss += 1
col = @_klass_str.constantize.columns.find{|c|
c.name == col_name.to_s
}
if col
cache.klass_hash[@_klass_str][col_name.to_s] = col.type
end
end
end
end
end
Version data entries
42 entries across 42 versions & 1 rubygems