Delete individual field feature #975

Author: EddyVerbruggen

src/app/firestore/index.ts

@@ -16,6 +16,7 @@ export namespace firestore {
         type: undefined,
         value: undefined,
         serverTimestamp: () => "SERVER_TIMESTAMP",
+        delete: () => "DELETE",
         arrayUnion: (fields: Array<any>) => new firebase.firestore.FieldValue("ARRAY_UNION", fields),
         arrayRemove: (fields: Array<any>) => new firebase.firestore.FieldValue("ARRAY_REMOVE", fields)
       };

src/firebase-common.ts

@@ -14,6 +14,7 @@ export class FieldValue {
   }
 
   static serverTimestamp = () => "SERVER_TIMESTAMP";
+  static delete = () => "DELETE";
   static arrayUnion = (fields: Array<any>) => new FieldValue("ARRAY_UNION", fields);
   static arrayRemove = (fields: Array<any>) => new FieldValue("ARRAY_REMOVE", fields);
 }

src/firebase.android.ts

@@ -114,6 +114,8 @@ firebase.toHashMap = obj => {
         // note that the Android Firestore SDK only supports this for 'update' (not for 'set')
         if (obj[property] === "SERVER_TIMESTAMP") {
           node.put(property, com.google.firebase.firestore.FieldValue.serverTimestamp());
+        } else if (obj[property] === "DELETE") {
+          node.put(property, com.google.firebase.firestore.FieldValue.delete());
         } else if (obj[property] instanceof FieldValue) {
           const fieldValue: FieldValue = obj[property];
           if (fieldValue.type === "ARRAY_UNION") {

src/firebase.d.ts

@@ -725,6 +725,7 @@ export namespace firestore {
     constructor(type: FieldValueType, value: any);
 
     static serverTimestamp: () => "SERVER_TIMESTAMP";
+    static delete: () => "DELETE";
     static arrayUnion: (fields: Array<any>) => FieldValue;
     static arrayRemove: (fields: Array<any>) => FieldValue;
   }

src/firebase.ios.ts

@@ -1820,6 +1820,8 @@ function fixSpecialField(item): any {
     return null;
   } else if (item === "SERVER_TIMESTAMP") {
     return FIRFieldValue.fieldValueForServerTimestamp();
+  } else if (item === "DELETE") {
+    return FIRFieldValue.fieldValueForDelete();
   } else if (item instanceof FieldValue) {
     const fieldValue: FieldValue = item;
     if (fieldValue.type === "ARRAY_UNION") {