Class: ActiveRecord::QueryCache

Inherits:
Object
  • Object
show all
Defined in:
lib/active_record/query_cache.rb

Overview

:nodoc:

Instance Method Summary collapse

Constructor Details

#initialize(connection) ⇒ QueryCache

Returns a new instance of QueryCache.



3
4
5
6
 
# File 'lib/active_record/query_cache.rb', line 3

def initialize(connection)
  @connection = connection
  @query_cache = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *arguments, &proc) ⇒ Object (private) 



40
41
42
 
# File 'lib/active_record/query_cache.rb', line 40

def method_missing(method, *arguments, &proc)
  @connection.send(method, *arguments, &proc)
end

Instance Method Details

#clear_query_cache ⇒ Object 



8
9
10
 
# File 'lib/active_record/query_cache.rb', line 8

def clear_query_cache
  @query_cache = {}
end

#columns(table_name, name = nil) ⇒ Object 



20
21
22
 
# File 'lib/active_record/query_cache.rb', line 20

def columns(table_name, name = nil)
  @query_cache["SHOW FIELDS FROM #{table_name}"] ||= @connection.columns(table_name, name)
end

#delete(sql, name = nil) ⇒ Object 



34
35
36
37
 
# File 'lib/active_record/query_cache.rb', line 34

def delete(sql, name = nil)
  clear_query_cache
  @connection.delete(sql, name)
end

#insert(sql, name = nil, pk = nil, id_value = nil) ⇒ Object 



24
25
26
27
 
# File 'lib/active_record/query_cache.rb', line 24

def insert(sql, name = nil, pk = nil, id_value = nil)
  clear_query_cache
  @connection.insert(sql, name, pk, id_value)
end

#select_all(sql, name = nil) ⇒ Object 



12
13
14
 
# File 'lib/active_record/query_cache.rb', line 12

def select_all(sql, name = nil)
  (@query_cache[sql] ||= @connection.select_all(sql, name)).dup
end

#select_one(sql, name = nil) ⇒ Object 



16
17
18
 
# File 'lib/active_record/query_cache.rb', line 16

def select_one(sql, name = nil)
  @query_cache[sql] ||= @connection.select_one(sql, name)
end

#update(sql, name = nil) ⇒ Object 



29
30
31
32
 
# File 'lib/active_record/query_cache.rb', line 29

def update(sql, name = nil)
  clear_query_cache
  @connection.update(sql, name)
end