private Expression ExtractQueryMetadata(MethodCallExpression methodCallExpression)
{
// We visit innerQueryable first so that we can get information in the same order operators are applied.
var genericMethodDefinition = methodCallExpression.Method.GetGenericMethodDefinition();
if (genericMethodDefinition == EntityFrameworkQueryableExtensions.AsTrackingMethodInfo ||
genericMethodDefinition == EntityFrameworkQueryableExtensions.AsNoTrackingMethodInfo)
{
var visitedExpression = Visit(methodCallExpression.Arguments[0]);
_queryCompilationContext.IsTracking
= genericMethodDefinition == EntityFrameworkQueryableExtensions.AsTrackingMethodInfo;
return(visitedExpression);
}
if (genericMethodDefinition == EntityFrameworkQueryableExtensions.TagWithMethodInfo)
{
var visitedExpression = Visit(methodCallExpression.Arguments[0]);
_queryCompilationContext.AddTag((string)((ConstantExpression)methodCallExpression.Arguments[1]).Value);
return(visitedExpression);
}
if (genericMethodDefinition == EntityFrameworkQueryableExtensions.IgnoreQueryFiltersMethodInfo)
{
var visitedExpression = Visit(methodCallExpression.Arguments[0]);
_queryCompilationContext.IgnoreQueryFilters = true;
return(visitedExpression);
}
return(null);
}
protected override Expression VisitMethodCall(MethodCallExpression methodCallExpression)
{
var method = methodCallExpression.Method;
if (method.DeclaringType == typeof(EntityFrameworkQueryableExtensions) &&
method.IsGenericMethod)
{
// We visit innerQueryable first so that we can get information in the same order operators are applied.
var genericMethodDefinition = method.GetGenericMethodDefinition();
if (genericMethodDefinition == EntityFrameworkQueryableExtensions.AsTrackingMethodInfo ||
genericMethodDefinition == EntityFrameworkQueryableExtensions.AsNoTrackingMethodInfo)
{
var innerQueryable = Visit(methodCallExpression.Arguments[0]);
_queryCompilationContext.IsTracking
= genericMethodDefinition == EntityFrameworkQueryableExtensions.AsTrackingMethodInfo;
return(innerQueryable);
}
if (genericMethodDefinition == EntityFrameworkQueryableExtensions.TagWithMethodInfo)
{
var innerQueryable = Visit(methodCallExpression.Arguments[0]);
_queryCompilationContext.AddTag((string)((ConstantExpression)methodCallExpression.Arguments[1]).Value);
return(innerQueryable);
}
}
return(base.VisitMethodCall(methodCallExpression));
}