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starting the column cache

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This commit is contained in:
Aaron Patterson 2010-12-03 08:55:14 -08:00
parent e95aba8d1d
commit dbc1f65244
1 changed files with 10 additions and 1 deletions
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11
lib/arel/visitors/to_sql.rb
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@ -10,6 +10,7 @@ module Arel
@last_column = nil
@quoted_tables = {}
@quoted_columns = {}
@column_cache = {}
end
def accept object
@ -66,9 +67,17 @@ module Arel
o.alias ? " AS #{visit o.alias}" : ''}"
end
def column_for relation, name
name = name.to_s
table = relation.name
columns = @connection.columns(table, "#{table} Columns")
columns.find { |col| col.name.to_s == name }
end
def visit_Arel_Nodes_Values o
"VALUES (#{o.expressions.zip(o.columns).map { |value, attr|
quote(value, attr && attr.column)
quote(value, attr && column_for(attr.relation, attr.name))
}.join ', '})"
end