|
private static CreateObjectQueryConstant ( object dbQuery ) : |
||
| dbQuery | object | |
| Результат | ||
protected override Expression VisitMember(MemberExpression node)
{
Check.NotNull<MemberExpression>(node, nameof (node));
PropertyInfo member = node.Member as PropertyInfo;
MemberExpression expression = node.Expression as MemberExpression;
if (member != (PropertyInfo) null && expression != null && (typeof (IQueryable).IsAssignableFrom(member.PropertyType) && typeof (DbContext).IsAssignableFrom(node.Member.DeclaringType)))
{
DbContext constantExpression = DbQueryVisitor.GetContextFromConstantExpression(expression.Expression, expression.Member);
if (constantExpression != null)
{
Expression objectQueryConstant = DbQueryVisitor.CreateObjectQueryConstant(member.GetValue((object) constantExpression, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, (Binder) null, (object[]) null, (CultureInfo) null));
if (objectQueryConstant != null)
return objectQueryConstant;
}
}
return base.VisitMember(node);
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
Check.NotNull<MethodCallExpression>(node, nameof (node));
if (typeof (DbContext).IsAssignableFrom(node.Method.DeclaringType))
{
MemberExpression memberExpression = node.Object as MemberExpression;
if (memberExpression != null)
{
DbContext constantExpression = DbQueryVisitor.GetContextFromConstantExpression(memberExpression.Expression, memberExpression.Member);
if (constantExpression != null && !node.Method.GetCustomAttributes<DbFunctionAttribute>(false).Any<DbFunctionAttribute>() && node.Method.GetParameters().Length == 0)
{
Expression objectQueryConstant = DbQueryVisitor.CreateObjectQueryConstant(node.Method.Invoke((object) constantExpression, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, (Binder) null, (object[]) null, (CultureInfo) null));
if (objectQueryConstant != null)
return objectQueryConstant;
}
}
}
return base.VisitMethodCall(node);
}
