Get generic list from single EndPoint C#-CodePudding

I create a generic method for getting a generic list with EF

public async Task<IEnumerable<T>> GetLookupListAsync<T>() where T : class, IBaseLookup
{
    return await _contextDb.GetDbSet<T>().ToListAsync();
}

Then from my API, I call this method multiple times based on the type I need

[HttpGet]
[Route("title")]
public async Task<IActionResult> GetTitlePersona(DataSourceLoadOptions loadOptions)
{
    var title = await _lookupService.GetLookupListAsync<Title>();
    return Ok(DataSourceLoader.Load(title , loadOptions));
}

[HttpGet]
[Route("Test")]
public async Task<IActionResult> GetTestPersona(DataSourceLoadOptions loadOptions)
{
    var test = await _lookupService.GetLookupListAsync<Test>();
    return Ok(DataSourceLoader.Load(test, loadOptions));
}

Is there a way to create a single EndPoint, not to create N EndPoints that do the same things?

CodePudding user response：

It's possible with reflection:

[HttpGet]
[Route("GetData")]
public async Task<IActionResult> GetData(string kind, DataSourceLoadOptions loadOptions)
{
    string namespace = "namespace";
    Type type = Type.GetType($"{namespace}.{kind}");

    MethodInfo method = typeof(_lookupService).GetMethod(nameof(_lookupService.GetLookupListAsync), BindingFlags.NonPublic | BindingFlags.Instance);
    MethodInfo genericMethod = method.MakeGenericMethod(type);
    var task = (Task)genericMethod.Invoke(this);
    await task;
    var resultProperty = task.GetType().GetProperty("Result");
    var result = resultProperty.GetValue(task)
    return Ok(DataSourceLoader.Load(result, loadOptions));
}

You have to set the namespace with the namespace where 'title' and 'test' are in, and probably you will have to cast 'result' to the right type...

CodePudding user response：

one simple way is to create a method with a kind variable and have a switch for different lookups, like:

[HttpGet]
[Route("GetData")]
public async Task<IActionResult> GetData(string kind, DataSourceLoadOptions loadOptions)
{
    if (kind == "Title")
    {
        var result = await _lookupService.GetLookupListAsync<Title>();
        return Ok(DataSourceLoader.Load(result, loadOptions));
    }
    else if (kind == "Test")
    {
        var result = await _lookupService.GetLookupListAsync<Test>();
        return Ok(DataSourceLoader.Load(result, loadOptions));
    }
}