protected override Expression VisitConstant(ConstantExpression expression)
{
var parentModelVisitor = LinqUtility.FindParentModelVisitor(this.ModelVisitor);
parentModelVisitor.ParameterNameCounter++;
string parameterName = "P" + parentModelVisitor.ParameterNameCounter;
parentModelVisitor.QueryData.BindVars.Add(new QueryParameter()
{
Name = parameterName, Value = expression.Value
});
ModelVisitor.QueryText.AppendFormat(" @{0} ", parameterName);
return(expression);
}
public override void VisitMainFromClause(MainFromClause fromClause, QueryModel queryModel)
{
if (fromClause.FromExpression as SubQueryExpression != null)
{
throw new Exception("MainFromClause.FromExpression cant be SubQueryExpression because group by is handle in itself clause");
}
string fromName = LinqUtility.ResolveCollectionName(this.Db, fromClause.ItemType);
// .Select(g => g.Select(gList => gList.Age)) subquery select, changes the fromName to group name (C1 for example)
if (fromClause.FromExpression.Type.Name == "IGrouping`2")
{
var groupByClause = LinqUtility.PriorGroupBy(ParnetModelVisitor);
var parentMVisitor = LinqUtility.FindParentModelVisitor(this);
//parentMVisitor.GroupByNameCounter++;
fromName = groupByClause[0].TranslateIntoName();
fromName = LinqUtility.ResolvePropertyName(fromName);
}
// == "IGrouping`2" => .Select(g => g.Select(gList => gList.Age)) subquery select
if (fromClause.FromExpression.NodeType == ExpressionType.Constant ||
fromClause.FromExpression.Type.Name == "IGrouping`2")
{
if (fromClause.FromExpression.Type.Name == "ArangoQueryable`1" || fromClause.FromExpression.Type.Name == "IGrouping`2")
{
QueryText.AppendFormat(" for {0} in {1} ", LinqUtility.ResolvePropertyName(fromClause.ItemName), fromName);
}
else
{
QueryText.AppendFormat(" for {0} in ", LinqUtility.ResolvePropertyName(fromClause.ItemName));
GetAqlExpression(fromClause.FromExpression, queryModel);
}
}
else
{
QueryText.AppendFormat(" for {0} in ", LinqUtility.ResolvePropertyName(fromClause.ItemName));
GetAqlExpression(fromClause.FromExpression, queryModel);
}
base.VisitMainFromClause(fromClause, queryModel);
}
public void VisitGroupByClause(GroupByClause groupByClause, QueryModel queryModel, int index)
{
var parentMVisitor = LinqUtility.FindParentModelVisitor(this);
parentMVisitor.GroupByNameCounter++;
groupByClause.IntoName = "C" + parentMVisitor.GroupByNameCounter;
groupByClause.FuncIntoName = Db.Setting.Linq.TranslateGroupByIntoName;
groupByClause.FromParameterName = queryModel.MainFromClause.ItemName;
QueryText.Append(" collect ");
if (groupByClause.Selector.NodeType != ExpressionType.New)
{
groupByClause.CollectVariableName = "CV" + parentMVisitor.GroupByNameCounter;
QueryText.AppendFormat(" {0} = ", LinqUtility.ResolvePropertyName(groupByClause.CollectVariableName));
}
GetAqlExpression(groupByClause.Selector, queryModel, true);
QueryText.AppendFormat(" into {0} ", LinqUtility.ResolvePropertyName(groupByClause.TranslateIntoName()));
groupByClause.Visited = true;
}