Add support for conditional mutation in Upsert Block (#3612)

(cherry picked from commit 7e1cce4)
hypermodeinc · Aug 9, 2019 · a62bcd6 · a62bcd6
1 parent d5c5a9e
commit a62bcd6
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diff --git a/dgraph/cmd/alpha/http.go b/dgraph/cmd/alpha/http.go
@@ -326,6 +326,13 @@ func mutationHandler(w http.ResponseWriter, r *http.Request) {
 				return
 			}
 		}
+		if condText, ok := ms["cond"]; ok && condText != nil {
+			mu.Cond, err = strconv.Unquote(string(condText.bs))
+			if err != nil {
+				x.SetStatus(w, x.ErrorInvalidRequest, err.Error())
+				return
+			}
+		}
 
 	case "application/rdf":
 		// Parse N-Quads.