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| author | Nick Kallen <nkallen@nick-kallens-computer-2.local> | 2008-04-13 17:03:03 -0700 |
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| committer | Nick Kallen <nkallen@nick-kallens-computer-2.local> | 2008-04-13 17:03:03 -0700 |
| commit | 4466409205d697f854f98ac0908a792a1601ecc6 (patch) | |
| tree | fd9bf6fc371437a58417caf9393d9a84fa5708d1 /lib | |
| parent | 2f9b70b6179d0b66f80d6edd3eca1017aec70659 (diff) | |
| download | rails-4466409205d697f854f98ac0908a792a1601ecc6.tar.gz rails-4466409205d697f854f98ac0908a792a1601ecc6.tar.bz2 rails-4466409205d697f854f98ac0908a792a1601ecc6.zip | |
adjacency lists work
- implementation is a bit complex, but i can't think of anything simpler
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/active_relation/primitives/attribute.rb | 8 | ||||
| -rw-r--r-- | lib/active_relation/relations/join.rb | 22 |
2 files changed, 27 insertions, 3 deletions
diff --git a/lib/active_relation/primitives/attribute.rb b/lib/active_relation/primitives/attribute.rb index d815656794..d37271490a 100644 --- a/lib/active_relation/primitives/attribute.rb +++ b/lib/active_relation/primitives/attribute.rb @@ -54,6 +54,14 @@ module ActiveRelation def =~(other) !(history & other.history).empty? end + + def %(other) + if other + (history - other.history) + (other.history - history) + else + history + end + end end include Congruence diff --git a/lib/active_relation/relations/join.rb b/lib/active_relation/relations/join.rb index dbcb520b92..a3e45f7f81 100644 --- a/lib/active_relation/relations/join.rb +++ b/lib/active_relation/relations/join.rb @@ -24,8 +24,17 @@ module ActiveRelation end def prefix_for(attribute) - externalize(relation1).prefix_for(attribute) or - externalize(relation2).prefix_for(attribute) + if relation1[attribute] && !relation2[attribute] + externalize(relation1).prefix_for(attribute) + elsif relation2[attribute] && !relation1[attribute] + externalize(relation2).prefix_for(attribute) + else + if (attribute % relation1[attribute]).size < (attribute % relation2[attribute]).size + externalize(relation1).prefix_for(attribute) + else + externalize(relation2).prefix_for(attribute) + end + end end def joins @@ -55,7 +64,14 @@ module ActiveRelation delegate :engine, :to => :relation def table_sql - relation.aggregation?? relation.to_sql(Sql::TableReference.new(engine)) : relation.table_sql + case + when relation.aggregation? + relation.to_sql(Sql::TableReference.new(engine)) + when relation.alias? + relation.table_sql + ' AS ' + engine.quote_table_name(relation.alias.to_s) + else + relation.table_sql + end end def selects |