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Francisco 21 posts 72 karma points

Mar 12, 2013 @ 03:46
0

DynamicNode and Where Clause with array filters.

Razor
I had a look at the DynamicNode Documentation particularly on the Where clause.

.Where("condition"[, valueIfTrue, valueIfFalse] )

Returns all items matching the given condition. For more details on queries and conditions, see the section below
```
@var ancestors = Model.Where("UmbracoNaviHide != @0", "True");

@var HomePage = Model.Where("NodeTypeAlias == @0 && Level == @1 || Name = @2", "HomePage", 0, "Home").First();
```
I have a razor view where I get a parameter from query string and then apply a filter using .Where. This parameter can be a single value, or can be a array. Ex: (?eventType=189 or ?eventType=188,189).

For a single value, the code is straight forward and works fine:
```
var types = HttpUtility.UrlDecode(Request.GetParameterOrDefault("eventType", ""));
var events = Model.Where("eventType.Equals(@0)", types);
```
However, when it is a array, I couldn't figure out how to solve this. The final result should something like:
```
var events = Model.Where("eventType.Equals(@0) || eventType.Equals(@1)", type1, type2);
```
But I don't have a type1, type 2. What I have is "types" which is an string like "188,189" that could be transformed in a string[] of {"188", "189"} using string.Split, but even though the arguments should be placed separetely as the example above.

Any ideas?

Thanks.
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Brett Hadley 16 posts 36 karma points

Mar 12, 2013 @ 14:42
0
Just a suggestion... :)

Can't you check if types is an array or if it's .Length > 1?
```
(if types is an array or more than one)
{
events =Model.Where("eventType.Equals(@0) || eventType.Equals(@1)", type1, type2);
} 
else
{
events =Model.Where("eventType.Equals(@0)", types);
}
```
It's an idea :)
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Francisco 21 posts 72 karma points

Mar 12, 2013 @ 22:13
0
Thank you for your suggestion Brett, but I don't have type1, type2, etc. I have only a array of type.

I noticed I'm interacting with DynamicNodeList instead of DynamicNode.

DynamicNodeList has a method ".Where" with this signature:
```
public IQueryable Where(string predicate, params object[] values)
```
If I use the code below, it works fine (returns 2 results):
```
events = events.Where("eventType == @0 || eventType == @1", 188, 189)
```
But if I use the following code, it does not work (returns no results).
```
events = events.Where("eventType == @0 || eventType == @1", new[] { 188, 189 });
```
However, it should work in the same way, according to C# documentation about params:

http://msdn.microsoft.com/en-us/library/w5zay9db(v=vs.71).aspx
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Francisco 21 posts 72 karma points

Mar 13, 2013 @ 03:37
100
I ended up using this code:
```
events = events.Where("eventType == 188 || eventType == 189");
```
But I would prefer using placeholders.
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DynamicNode and Where Clause with array filters.

.Where("condition"[, valueIfTrue, valueIfFalse] )