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author | Mathias Stearn <mathias@10gen.com> | 2012-07-14 15:04:12 -0400 |
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committer | Mathias Stearn <mathias@10gen.com> | 2012-07-20 17:54:22 -0400 |
commit | ec18db98680d31b120350ad45d5f74095125e9a5 (patch) | |
tree | 93a4d1be1245a59aab3bc0eb13a4532888a1963a /src/mongo/db/pipeline/field_path.h | |
parent | 7d1e8a5090569d4d30bd3ec0dfb76e62baf4f304 (diff) | |
download | mongo-ec18db98680d31b120350ad45d5f74095125e9a5.tar.gz |
Rewrite ExpressionObject
The main difference between this version and the old is that the following
three $pipelines will produce the same output (SERVER-6468):
{'a.b': 1} // classic inclusion
{a: {b: 1} // nested inclusion
{'a.b': '$a.b'} // dotted FieldPathExpression
{a: {b: '$a.b'} // nested FieldPathExpression
Additionally support for exclusion of fields other than _id has been
removed for 2.2 (SERVER-6361)
Other related bugs:
SERVER-6177 better error for {a:1, 'a.b':1}
SERVER-6181 support for computed _id
SERVER-6184 support {'a.b': 1, a:{c:1}} in either order
Remaining TODOs:
Re-enable the isSimple() method
See if this can be used more directly by $group to support nested fields (SERVER-6198)
Disabled test for SERVER-5369 because it depends on ability to exclude
arbitrary fields.
Diffstat (limited to 'src/mongo/db/pipeline/field_path.h')
-rwxr-xr-x | src/mongo/db/pipeline/field_path.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mongo/db/pipeline/field_path.h b/src/mongo/db/pipeline/field_path.h index f6f59ad3295..efbda98a55d 100755 --- a/src/mongo/db/pipeline/field_path.h +++ b/src/mongo/db/pipeline/field_path.h @@ -83,6 +83,9 @@ namespace mongo { static const char prefix[]; + /** a FieldPath like this but missing the first element (useful for recursion) */ + FieldPath tail() const; + private: vector<string> vFieldName; }; |