Methods
C
N
T
Attributes
[R] columns
[R] columns_hash
[R] primary_keys
[R] tables
[R] connection
Class Public methods
new(conn)

Source: show | on GitHub 

    # File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 7
 7:       def initialize(conn)
 8:         @connection = conn
 9:         @tables     = {}
10: 
11:         @columns = Hash.new do |h, table_name|
12:           h[table_name] = conn.columns(table_name, "#{table_name} Columns")
13:         end
14: 
15:         @columns_hash = Hash.new do |h, table_name|
16:           h[table_name] = Hash[columns[table_name].map { |col|
17:             [col.name, col]
18:           }]
19:         end
20: 
21:         @primary_keys = Hash.new do |h, table_name|
22:           h[table_name] = table_exists?(table_name) ? conn.primary_key(table_name) : nil
23:         end
24:       end
Instance Public methods
clear!()

Clears out internal caches

Source: show | on GitHub 

    # File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 34
34:       def clear!
35:         @columns.clear
36:         @columns_hash.clear
37:         @primary_keys.clear
38:         @tables.clear
39:       end
clear_table_cache!(table_name)

Clear out internal caches for table with table_name.

Source: show | on GitHub 

    # File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 42
42:       def clear_table_cache!(table_name)
43:         @columns.delete table_name
44:         @columns_hash.delete table_name
45:         @primary_keys.delete table_name
46:         @tables.delete table_name
47:       end
table_exists?(name)

A cached lookup for table existence.

Source: show | on GitHub 

    # File activerecord/lib/active_record/connection_adapters/schema_cache.rb, line 27
27:       def table_exists?(name)
28:         return @tables[name] if @tables.key? name
29: 
30:         @tables[name] = connection.table_exists?(name)
31:       end