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; }