private BsonDocument[] Translate <T>(IQueryable <T> queryable)
{
var provider = (MongoQueryProvider <T>)queryable.Provider;
var executableQuery = ExpressionToExecutableQueryTranslator.Translate <T, T>(provider, queryable.Expression);
return(executableQuery.Pipeline.Stages.Select(s => (BsonDocument)s.Render()).ToArray());
}
private BsonDocument[] Translate <T>(IQueryable <T> queryable)
{
var queryProvider = (MongoQueryProvider <Person>)queryable.Provider;
var executableQuery = ExpressionToExecutableQueryTranslator.Translate <Person, IGrouping <int, Person> >(queryProvider, queryable.Expression);
return(executableQuery.Pipeline.Render().AsBsonArray.Cast <BsonDocument>().ToArray());
}
protected List <BsonDocument> Translate <TDocument, TResult>(IQueryable <TResult> queryable)
{
var provider = (MongoQueryProvider <TDocument>)queryable.Provider;
var executableQuery = ExpressionToExecutableQueryTranslator.Translate <TDocument, TResult>(provider, queryable.Expression);
var stages = executableQuery.Pipeline.Stages;
return(stages.Select(s => s.Render().AsBsonDocument).ToList());
}
public void SelectMany_should_translate_correctly()
{
var client = DriverTestConfiguration.Linq3Client;
var database = client.GetDatabase("test");
var collection = database.GetCollection <Item>("test");
var queryable = collection.AsQueryable()
.SelectMany(
x => x.Meta,
(item, meta) =>
new ProjectedItem
{
ItemId = item.Id.ToString(),
Meta = meta,
Property = item.Properties.First(p => p.Id == meta.PropertyId)
});
var provider = (MongoQueryProvider <Item>)queryable.Provider;
var executableQuery = ExpressionToExecutableQueryTranslator.Translate <Item, ProjectedItem>(provider, queryable.Expression);
var stages = executableQuery.Pipeline.Stages.Select(s => s.Render());
var expectedStages = new string[]
{
@"
{ $project : {
_v : { $map : {
input : '$Meta',
as : 'meta',
in : {
ItemId : { $toString : '$_id' },
Meta : '$$meta',
Property : {
$arrayElemAt : [
{ $filter : { input : '$Properties', as : 'p', cond : { $eq : ['$$p._id', '$$meta.PropertyId'] } } },
0
]
}
} } },
_id : 0
} }",
@"{ $unwind : '$_v' }"
};
stages.Should().Equal(expectedStages.Select(s => BsonDocument.Parse(s)));
}
