private VariableInitializer TransformMapDefinitionFromLinqQuerySyntax(string query, out string entityName)
{
entityName = null;
var variableDeclaration = QueryParsingUtils.GetVariableDeclarationForLinqQuery(query, RequiresSelectNewAnonymousType);
var queryExpression = ((QueryExpression)variableDeclaration.Initializer);
var fromClause = GetFromClause(queryExpression);
var expression = fromClause.Expression;
HandleCollectionName(expression, fromClause, queryExpression, ref entityName);
var projection =
QueryParsingUtils.GetAnonymousCreateExpression(
queryExpression.Clauses.OfType <QuerySelectClause>().First().Expression);
var anonymousTypeCreateExpression = projection as AnonymousTypeCreateExpression;
if (anonymousTypeCreateExpression == null)
{
return(variableDeclaration);
}
var objectInitializer = anonymousTypeCreateExpression.Initializers;
var identifierExpression = new IdentifierExpression(fromClause.Identifier);
if (objectInitializer.OfType <NamedExpression>().Any(x => x.Name == Constants.DocumentIdFieldName))
{
return(variableDeclaration);
}
variableDeclaration.AcceptVisitor(new AddDocumentIdToQueries(), null);
variableDeclaration.AcceptVisitor(this.transformFromClauses, null);
return(variableDeclaration);
}
private bool AddDocumentIdFieldToLambdaIfCreatingNewObject(LambdaExpression lambdaExpression)
{
var objectCreateExpression = QueryParsingUtils.GetAnonymousCreateExpression(lambdaExpression.ExpressionBody) as ObjectCreateExpression;
if (objectCreateExpression == null || objectCreateExpression.IsAnonymousType == false)
{
return(false);
}
var objectInitializer = objectCreateExpression.ObjectInitializer;
var identifierExpression = new IdentifierExpression(lambdaExpression.Parameters[0].ParameterName);
if (objectInitializer.CreateExpressions.OfType <NamedArgumentExpression>().Any(x => x.Name == Constants.DocumentIdFieldName))
{
return(false);
}
objectCreateExpression.ObjectInitializer = new CollectionInitializerExpression(objectInitializer.CreateExpressions.ToList())
{
CreateExpressions =
{
new NamedArgumentExpression
{
Name = Constants.DocumentIdFieldName,
Expression = new MemberReferenceExpression(identifierExpression, Constants.DocumentIdFieldName)
}
}
};
return(true);
}
private bool AddDocumentIdFieldToLambdaIfCreatingNewObject(LambdaExpression lambdaExpression)
{
var objectCreateExpression = QueryParsingUtils.GetAnonymousCreateExpression(lambdaExpression.Body) as AnonymousTypeCreateExpression;
if (objectCreateExpression == null)
{
return(false);
}
var initializers = objectCreateExpression.Initializers;
var identifierExpression = new IdentifierExpression(lambdaExpression.Parameters.First().Name);
if (initializers.OfType <NamedExpression>().Any(x => x.Name == Constants.DocumentIdFieldName))
{
return(false);
}
objectCreateExpression.Initializers.Add(new NamedExpression
{
Name = Constants.DocumentIdFieldName,
Expression = new MemberReferenceExpression(identifierExpression, Constants.DocumentIdFieldName)
});
return(true);
}
private bool AddDocumentIdFieldToLambdaIfCreatingNewObject(LambdaExpression lambdaExpression)
{
var objectCreateExpression = QueryParsingUtils.GetAnonymousCreateExpression(lambdaExpression.Body) as AnonymousTypeCreateExpression;
if (objectCreateExpression == null)
{
return(false);
}
var initializers = objectCreateExpression.Initializers;
if (initializers.OfType <NamedExpression>().Any(x => x.Name == Constants.DocumentIdFieldName))
{
return(false);
}
var parameter = lambdaExpression.Parameters.First();
var identifier = parameter.Name;
// Support getting the __document_id from IGrouping parameter
var castExpression = parameter.Parent.Parent.Parent as CastExpression;
if (castExpression != null)
{
var simpleType = castExpression.Type as SimpleType;
if (simpleType != null && simpleType.Identifier == "Func<IGrouping<dynamic,dynamic>, dynamic>")
{
identifier += ".Key";
}
}
var identifierExpression = new IdentifierExpression(identifier);
objectCreateExpression.Initializers.Add(new NamedExpression
{
Name = Constants.DocumentIdFieldName,
Expression = new MemberReferenceExpression(identifierExpression, Constants.DocumentIdFieldName)
});
return(true);
}
private VariableInitializer TransformMapDefinitionFromLinqQuerySyntax(string query, out string entityName)
{
entityName = null;
var variableDeclaration = QueryParsingUtils.GetVariableDeclarationForLinqQuery(query, RequiresSelectNewAnonymousType);
var queryExpression = ((QueryExpression)variableDeclaration.Initializer);
var fromClause = queryExpression.Clauses.OfType <QueryFromClause>().First();
var expression = fromClause.Expression;
if (expression is MemberReferenceExpression) // collection
{
var mre = (MemberReferenceExpression)expression;
entityName = mre.MemberName;
fromClause.Expression = mre.Target;
//doc["@metadata"]["Raven-Entity-Name"]
var metadata = new IndexerExpression(
new IndexerExpression(new IdentifierExpression(fromClause.Identifier), new List <Expression> {
new StringLiteralExpression("@metadata")
}),
new List <Expression> {
new StringLiteralExpression(Constants.RavenEntityName)
}
);
// string.Equals(doc["@metadata"]["Raven-Entity-Name"], "Blogs", StringComparison.OrdinalIgnoreCase)
var binaryOperatorExpression =
new InvocationExpression(
new MemberReferenceExpression(new TypeReferenceExpression(new PrimitiveType("string")), "Equals"),
new List <Expression>
{
metadata,
new StringLiteralExpression(mre.MemberName),
new MemberReferenceExpression(new TypeReferenceExpression(new SimpleType(typeof(StringComparison).FullName)), "InvariantCultureIgnoreCase")
});
queryExpression.Clauses.InsertAfter(fromClause,
new QueryWhereClause
{
Condition = binaryOperatorExpression
});
}
var projection =
QueryParsingUtils.GetAnonymousCreateExpression(
queryExpression.Clauses.OfType <QuerySelectClause>().First().Expression);
var anonymousTypeCreateExpression = projection as AnonymousTypeCreateExpression;
if (anonymousTypeCreateExpression == null)
{
return(variableDeclaration);
}
var objectInitializer = anonymousTypeCreateExpression.Initializers;
var identifierExpression = new IdentifierExpression(fromClause.Identifier);
if (objectInitializer.OfType <NamedExpression>().Any(x => x.Name == Constants.DocumentIdFieldName))
{
return(variableDeclaration);
}
objectInitializer.Add(
new NamedExpression
{
Name = Constants.DocumentIdFieldName,
Expression = new MemberReferenceExpression(identifierExpression, Constants.DocumentIdFieldName)
});
return(variableDeclaration);
}
