public void VisitUpsertClause(UpsertClause upsertClause, QueryModel queryModel)
{
QueryText.Append(" upsert ");
GetAqlExpression(upsertClause.SearchSelector, queryModel);
QueryText.Append(" insert ");
GetAqlExpression(upsertClause.InsertSelector, queryModel);
QueryText.Append(" update ");
GetAqlExpression(upsertClause.UpdateSelector, queryModel);
QueryText.AppendFormat(" in {0} ", LinqUtility.ResolveCollectionName(Db, upsertClause.CollectionType));
}
public void VisitRemoveClause(RemoveClause removeClause, QueryModel queryModel)
{
if (removeClause.KeySelector != null)
{
QueryText.Append(" remove ");
GetAqlExpression(removeClause.KeySelector, queryModel);
}
else
{
QueryText.AppendFormat(" remove {0} ", LinqUtility.ResolvePropertyName(removeClause.ItemName));
}
QueryText.AppendFormat(" in {0} ", LinqUtility.ResolveCollectionName(Db, removeClause.CollectionType));
}
public void VisitInsertClause(InsertClause insertClause, QueryModel queryModel)
{
if (insertClause.WithSelector != null)
{
QueryText.Append(" insert ");
GetAqlExpression(insertClause.WithSelector, queryModel);
}
else
{
QueryText.AppendFormat(" insert {0} ", LinqUtility.ResolvePropertyName(insertClause.ItemName));
}
QueryText.AppendFormat(" in {0} ", LinqUtility.ResolveCollectionName(Db, insertClause.CollectionType));
}
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 VisitUpdateReplaceClause(UpdateReplaceClause updateReplaceClause, QueryModel queryModel)
{
if (updateReplaceClause.KeySelector != null)
{
QueryText.AppendFormat(" {0} ", updateReplaceClause.Command);
GetAqlExpression(updateReplaceClause.KeySelector, queryModel);
QueryText.AppendFormat(" with ");
}
else
{
QueryText.AppendFormat(" {0} {1} with ", updateReplaceClause.Command, LinqUtility.ResolvePropertyName(updateReplaceClause.ItemName));
}
GetAqlExpression(updateReplaceClause.WithSelector, queryModel);
QueryText.AppendFormat(" in {0} ", LinqUtility.ResolveCollectionName(Db, updateReplaceClause.CollectionType));
}
public override void VisitAdditionalFromClause(AdditionalFromClause fromClause, QueryModel queryModel, int index)
{
var subQuery = fromClause.FromExpression as SubQueryExpression;
if (subQuery != null)
{
this.DontReturn = true;
GetAqlExpression(subQuery, queryModel, handleJoin: true);
}
else if (fromClause.FromExpression.Type.Name == "ArangoQueryable`1")
{
string fromName = LinqUtility.ResolveCollectionName(this.Db, fromClause.ItemType);
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);
}
}
protected override Expression VisitMethodCall(MethodCallExpression expression)
{
if (expression.Method.Name == "As")
{
Visit(expression.Arguments[0]);
return(expression);
}
if (expression.Method.Name == "get_Item" && expression.Method.DeclaringType.Name == "IList`1")
{
Visit(expression.Object);
ModelVisitor.QueryText.Append(" [ ");
Visit(expression.Arguments[0]);
ModelVisitor.QueryText.Append(" ] ");
return(expression);
}
string methodName;
var userFunction = ModelVisitor.Db.SharedSetting.AqlFunctions.FindFunctionAttribute(expression.Method);
bool methodExists = userFunction != null;
if (methodExists)
{
methodName = userFunction.Name;
}
else
{
methodExists = aqlMethods.TryGetValue(expression.Method.Name, out methodName);
}
if (!methodExists)
{
throw new InvalidOperationException($"Method {expression.Method.Name} is not supported in ArangoLinqProvider");
}
string argumentSeprator = null;
bool noParenthesis = methodsWithNoParenthesis.TryGetValue(methodName, out argumentSeprator);
if (!noParenthesis)
{
ModelVisitor.QueryText.AppendFormat(" {0}( ", methodName);
argumentSeprator = " , ";
}
Type[] genericArguments = null;
if (methodsWithFirstGenericArgument.Contains(methodName))
{
genericArguments = expression.Method.GetGenericArguments();
var collection = LinqUtility.ResolveCollectionName(ModelVisitor.Db, genericArguments[0]);
ModelVisitor.QueryText.AppendFormat(" {0}{1}", collection, argumentSeprator);
}
if (methodsWithSecondGenericArgument.Contains(methodName))
{
var collection = LinqUtility.ResolveCollectionName(ModelVisitor.Db, genericArguments[1]);
ModelVisitor.QueryText.AppendFormat(" {0}{1}", collection, argumentSeprator);
}
for (int i = 0; i < expression.Arguments.Count; i++)
{
Visit(expression.Arguments[i]);
if (i != expression.Arguments.Count - 1)
{
ModelVisitor.QueryText.Append(argumentSeprator);
}
}
if (!noParenthesis)
{
ModelVisitor.QueryText.Append(" ) ");
}
return(expression);
}
