diff --git a/src/views/service-creator.ts b/src/views/service-creator.ts
index 78fee52..8c861dd 100644
--- a/src/views/service-creator.ts
+++ b/src/views/service-creator.ts
@@ -1,4 +1,4 @@
-import {EndpointDef} from "../systemGenService";
+import {ColumnDef, EndpointDef, Filter} from "../systemGenService";
 import {lowercaseFirstLetter} from "./helpers";
 import {buildMapperFunctionName} from "./mapper-creator";
 
@@ -12,9 +12,7 @@ function buildServiceFunction(view: EndpointDef): string {
     let func: string = '';
     let isListOrSearch: boolean = view.type === 'list' || view.type === 'search';
     let funcName: string = buildServiceFunctionName(view);
-    // there should never be an 'undefined' item in funcParams but the compiler complained that it was possible
-    // TODO: funcParams should be sorted by 'required' so the optional params can come last and be left off when calling
-    let funcParams: (string | undefined)[] = (view.columns?.filter(column => column.param).map(column => column.param) || []).concat(view.filters?.filter(filter => filter.param).map(filter => filter.param) || []);
+    let funcParams: string[] = getFuncParams(view);
     let columnParams: string[] = view.columns?.filter(column => column.param).map(column => { return '\n      ' + column.param + ': ' + column.param; });
     let filterParams: string[] = view.filters?.filter(filter => filter.param).map(filter => { return '\n      ' + filter.param + ': ' + filter.param; }) || [];
 
@@ -33,6 +31,41 @@ function buildServiceFunction(view: EndpointDef): string {
     return func;
 }
 
+function getFuncParams(view: EndpointDef): string[] {
+    let filters = view.filters || [];
+    let columnList: ParamDef[] = view.columns?.filter((column) => {return column.param;}).map((column) => {
+        return {
+            param: column.param,
+            required: column.required
+        };
+    });
+
+    let filterList: ParamDef[] = filters.filter((column) => {return column.param;}).map((filter) => {
+        return {
+            param: filter.param,
+            required: filter.required
+        };
+    });
+
+    // funcParams should be sorted by 'required' so the optional params can come last and be left off when calling
+    let combinedList = columnList.concat(filterList).sort((a, b) => {
+        if (a.required && b.required) {
+            return 0;
+        }
+        if (a.required) {
+            return -1;
+        }
+        if (b.required) {
+            return 1;
+        }
+        return 0;
+    });
+
+    return combinedList.map((param) => {
+        return param.param || '';
+    });
+}
+
 function buildServiceFunctionName(view: EndpointDef): string {
     return buildMapperFunctionName(view); // the functions should have the same name... I'm pretty sure...
 }
@@ -41,6 +74,11 @@ function mapperInstance(view: EndpointDef): string {
     return `${lowercaseFirstLetter(view.component)}Mapper`;
 }
 
+interface ParamDef {
+    param?: string;
+    required?: boolean;
+}
+
 export {
     createServiceFunc
 }
\ No newline at end of file
diff --git a/src/views/views-creator.ts b/src/views/views-creator.ts
index 22cc7ff..8fec512 100644
--- a/src/views/views-creator.ts
+++ b/src/views/views-creator.ts
@@ -47,6 +47,7 @@ function createComponent(component: ComponentDef, systemDef: SystemDef) {
           componentResolve();
         });
       }
+      // TODO: remove {{component}} folder that hasn't been used
     });
   });
 }