1 files changed, 21 insertions, 2 deletions
diff --git a/src/fields/Document.ts b/src/fields/Document.ts
index 9580ab5c0..0551a74b0 100644
--- a/src/fields/Document.ts
+++ b/src/fields/Document.ts
@@ -1,5 +1,6 @@
 import { Field, Cast, Opt } from "./Field"
 import { Key, KeyStore } from "./Key"
+import { NumberField } from "./NumberField";
 import { ObservableMap, computed } from "mobx";
 import { TextField } from "./TextField";
 
@@ -30,17 +31,35 @@ export class Document extends Field {
         return field;
     }
 
-    GetFieldT<T extends Field = Field>(key: Key, ctor: { new(): T }, ignoreProto?: boolean): Opt<T> {
+    GetFieldT<T extends Field = Field>(key: Key, ctor: { new(): T }, ignoreProto: boolean = false): Opt<T> {
         return Cast(this.GetField(key, ignoreProto), ctor);
     }
 
+    GetFieldOrCreate<T extends Field>(key: Key, ctor: { new(): T }, ignoreProto: boolean = false): T {
+        const field = this.GetFieldT(key, ctor, ignoreProto);
+        if (field) {
+            return field;
+        }
+        const newField = new ctor();
+        this.SetField(key, newField);
+        return newField;
+    }
+
     GetFieldValue<T, U extends { Data: T }>(key: Key, ctor: { new(): U }, defaultVal: T): T {
         let val = this.GetField(key);
         let vval = (val && val instanceof ctor) ? val.Data : defaultVal;
         return vval;
     }
 
-    SetField(key: Key, field: Opt<Field>): void {
+    GetNumberValue(key: Key, defaultVal: number): number {
+        return this.GetFieldValue(key, NumberField, defaultVal);
+    }
+
+    GetTextValue(key: Key, defaultVal: string): string {
+        return this.GetFieldValue(key, TextField, defaultVal);
+    }
+
+    SetField(key: Key, field: Field | undefined): void {
         if (field) {
             this.fields.set(key, field);
         } else {