[55] Filter on lessons title

[danielferecatu]

What does it fix?

Issue #55

How has it been tested?

From GraphiQL with seed data:

query Themes {
    lessons(term: "ip") {
        items {
            title
        }
    }
}

{
  "data": {
    "lessons": {
      "items": [
        {
          "title": "Consectetur adipiscing elit"
        },
        {
          "title": "Nemo enim ipsam voluptatem"
        }
      ]
    }
  }
}

[nicolaes]

Consider ignoring case and accents (e.g. diacritice): EF.Functions.ILike(l.Title, $"%{filter.Term}%"))

Edit: this only does case-insensitivity. For the accent part you can move to Postgres query or remove accents manually.

[danielferecatu]

Thanks for the remarks. I will update the code. For the accent case, I noticed that EF has a function EF.Functions.Unaccent() but only works with UTF-8 dbs, I'll check that and treat accents also.

[alexandru-calinoiu]

Actually I think it will be better to do this from the query level so we can easily reuse it for all filter terms.

I propose creating a custom string scalar type

public class FilterTermStringGraphType : StringGraphType
{
    public override object ParseValue(object value)
    {
        // Your preprocessing logic
        string processedValue = value.ToString().ToLower(); // Example: convert to lowercase
        // Add more cleaning/preprocessing steps as needed

        return base.ParseValue(processedValue);
    }
}

And use this as the argument type.

The benefit of this approach is that we can have a simple way to update cleaning for this terms no matter of the query they are used in.

[alexandru-calinoiu]

Proposed alternative to term filtering

[alexandru-calinoiu]

Actually I think it will be better to do this from the query level so we can easily reuse it for all filter terms.

I propose creating a custom string scalar type

public class FilterTermStringGraphType : StringGraphType
{
    public override object ParseValue(object value)
    {
        // Your preprocessing logic
        string processedValue = value.ToString().ToLower(); // Example: convert to lowercase
        // Add more cleaning/preprocessing steps as needed

        return base.ParseValue(processedValue);
    }
}

And use this as the argument type.

The benefit of this approach is that we can have a simple way to update cleaning for this terms no matter of the query they are used in.