Getting Combo-box values set from REST API - acumatica

Question

I am working with Contacts via REST API and I am trying to add an input field in my application for specifying the Source of the Contact. The problem is that the Source field is a combo box, which means that its values can be modified by Automation Steps (SM205000). For example, below is the list of the default values for the Source:
which corresponds to the CRMSourcesAttribute of that field
// Token: 0x020003D3 RID: 979
public class CRMSourcesAttribute : PXStringListAttribute
{
// Token: 0x06004052 RID: 16466 RVA: 0x000FD4A4 File Offset: 0x000FB6A4
public CRMSourcesAttribute() : base(new string[]
{
"W",
"H",
"R",
"L",
"O"
}, new string[]
{
"Web",
"Phone Inquiry",
"Referral",
"Purchased List",
"Other"
})
{
}
// Token: 0x04002158 RID: 8536
public const string _WEB = "W";
// Token: 0x04002159 RID: 8537
public const string _PHONE_INQ = "H";
// Token: 0x0400215A RID: 8538
public const string _REFERRAL = "R";
// Token: 0x0400215B RID: 8539
public const string _PURCHASED_LIST = "L";
// Token: 0x0400215C RID: 8540
public const string _OTHER = "O";
}
Should I go through the Automation Steps tables to get the final values of the combo-box or there is a way to get it by REST API specifying, for example, the DAC.FIELD?

Answer 1

For tasks like these, I'd suggest to use reflection. Below goes example of reading Attributes with sample of usage:
protected IEnumerable records()
{
//var row = new ClassFilter { ClassName = "PX.Objects.CR.CRMSourcesAttribute" };
var row = Filter.Current;
if (row != null && !string.IsNullOrWhiteSpace(row.ClassName))
{
var type = Type.GetType(row.ClassName) ??
Type.GetType(row.ClassName + ", PX.Objects");
if (type != null)
switch (type.BaseType.Name)
{
case "PXIntListAttribute":
{
int[] values;
string[] labels;
GetRecords(type, out values, out labels);
for (int i = 0; i < values.Length; i++)
yield return new KeyValueRecord { Key = values[i].ToString(), UiValue = labels[i] };
break;
}
case "PXStringListAttribute":
{
string[] values, labels;
GetRecords(type, out values, out labels);
for (int i = 0; i < values.Length; i++)
yield return new KeyValueRecord { Key = values[i], UiValue = labels[i] };
break;
}
}
}
}
private void GetRecords<T>(Type type, out T[] values, out string[] labels)
{
var obj = Activator.CreateInstance(type);
var flags = BindingFlags.NonPublic | BindingFlags.Instance;
values = type.GetField("_AllowedValues", flags).GetValue(obj) as T[];
labels = type.GetField("_AllowedLabels", flags).GetValue(obj) as string[];
}
and picture:
After that you can just add graph and DAC to endpoint and expose it.
Full source code with comments is available here.