// Retrieves all tags in the provided list that match the provided where clause.
func (m *mongoStore) GetTags(tags []string, where bson.M) (common.SmapMessageList, error) {
var (
staged *mgo.Query
selectTags bson.M
whereClause bson.M
x []bson.M
)
if len(where) != 0 {
whereClause = make(bson.M)
for wk, wv := range where {
whereClause[common.FixMongoKey(wk)] = wv
}
}
staged = m.metadata.Find(whereClause)
if len(tags) == 0 { // select all
selectTags = bson.M{"_id": 0, "_api": 0}
} else {
selectTags = bson.M{"_id": 0}
for _, tag := range tags {
selectTags[common.FixMongoKey(tag)] = 1
}
}
err := staged.Select(selectTags).All(&x)
// trim down empty rows
filtered := x[:0]
for _, doc := range x {
if len(doc) != 0 {
filtered = append(filtered, doc)
}
}
return common.SmapMessageListFromBson(filtered), err
}
func (m *mongoStore) GetDistinct(tag string, where bson.M) (common.DistinctResult, error) {
var (
result common.DistinctResult
whereClause bson.M
fixedTag = common.FixMongoKey(tag)
)
if len(where) != 0 {
whereClause = make(bson.M)
for wk, wv := range where {
whereClause[common.FixMongoKey(wk)] = wv
}
}
err := m.metadata.Find(where).Distinct(fixedTag, &result)
return result, err
}
func (m *mongoStore) GetUUIDs(where bson.M) ([]common.UUID, error) {
var results []common.UUID
var x []bson.M
var whereClause bson.M
if len(where) != 0 {
whereClause = make(bson.M)
for wk, wv := range where {
whereClause[common.FixMongoKey(wk)] = wv
}
}
selectClause := bson.M{"_id": 0, "uuid": 1}
err := m.metadata.Find(where).Select(selectClause).All(&x)
results = make([]common.UUID, len(x))
for i, doc := range x {
results[i] = common.UUID(doc["uuid"].(string))
}
return results, err
}