Fix a modelFactory bug

package.json

@@ -1,6 +1,6 @@
 {
   "name": "express-restify-mongoose",
-  "version": "9.0.2",
+  "version": "9.0.3",
   "description": "Easily create a flexible REST interface for mongoose models",
   "keywords": [
     "ReST",

src/express-restify-mongoose.ts

@@ -96,15 +96,16 @@ export function serve(
     app.delete = app.del;
   }
 
-  app.use(async (req, res, next) => {
+  // @ts-expect-error restify
+  const modelMiddleware = async (req, res, next) => {
     const getModel = serveOptions?.modelFactory?.getModel;
 
     req.erm = {
       model: typeof getModel === 'function' ? await getModel(req) : model,
     };
 
     next();
-  });
+  };
 
   const accessMiddleware = serveOptions.access
     ? getAccessHandler({
@@ -115,7 +116,7 @@ export function serve(
     : [];
 
   const ensureContentType = getEnsureContentTypeHandler(serveOptions);
-  const filterAndFindById = getFilterAndFindByIdHandler(serveOptions, model);
+  const filterAndFindById = getFilterAndFindByIdHandler(serveOptions);
   const prepareQuery = getPrepareQueryHandler(serveOptions);
   const prepareOutput = getPrepareOutputHandler(
     serveOptions,
@@ -125,6 +126,7 @@ export function serve(
 
   app.get(
     uriItems,
+    modelMiddleware,
     prepareQuery,
     serveOptions.preMiddleware,
     serveOptions.preRead,
@@ -135,6 +137,7 @@ export function serve(
 
   app.get(
     uriCount,
+    modelMiddleware,
     prepareQuery,
     serveOptions.preMiddleware,
     serveOptions.preRead,
@@ -145,6 +148,7 @@ export function serve(
 
   app.get(
     uriItem,
+    modelMiddleware,
     prepareQuery,
     serveOptions.preMiddleware,
     serveOptions.preRead,
@@ -155,6 +159,7 @@ export function serve(
 
   app.get(
     uriShallow,
+    modelMiddleware,
     prepareQuery,
     serveOptions.preMiddleware,
     serveOptions.preRead,
@@ -165,6 +170,7 @@ export function serve(
 
   app.post(
     uriItems,
+    modelMiddleware,
     prepareQuery,
     ensureContentType,
     serveOptions.preMiddleware,
@@ -176,6 +182,7 @@ export function serve(
 
   app.post(
     uriItem,
+    modelMiddleware,
     deprecate(
       prepareQuery,
       "express-restify-mongoose: in a future major version, the POST method to update resources will be removed. Use PATCH instead."
@@ -191,6 +198,7 @@ export function serve(
 
   app.put(
     uriItem,
+    modelMiddleware,
     deprecate(
       prepareQuery,
       "express-restify-mongoose: in a future major version, the PUT method will replace rather than update a resource. Use PATCH instead."
@@ -206,6 +214,7 @@ export function serve(
 
   app.patch(
     uriItem,
+    modelMiddleware,
     prepareQuery,
     ensureContentType,
     serveOptions.preMiddleware,
@@ -218,6 +227,7 @@ export function serve(
 
   app.delete(
     uriItems,
+    modelMiddleware,
     prepareQuery,
     serveOptions.preMiddleware,
     serveOptions.preDelete,
@@ -227,6 +237,7 @@ export function serve(
 
   app.delete(
     uriItem,
+    modelMiddleware,
     prepareQuery,
     serveOptions.preMiddleware,
     serveOptions.findOneAndRemove ? [] : filterAndFindById,

src/middleware/filterAndFindById.ts

@@ -8,13 +8,15 @@ export function getFilterAndFindByIdHandler(
   options: Pick<
     Options,
     "contextFilter" | "idProperty" | "onError" | "readPreference"
-  >,
-  model: mongoose.Model<unknown>
+  >
 ) {
   const errorHandler = getErrorHandler(options);
 
   const fn: RequestHandler = function filterAndFindById(req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     if (!req.params.id) {
       return next();

src/operations.ts

@@ -51,7 +51,10 @@ export function operations(
   }
 
   const getItems: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     if (isDistinctExcluded(req)) {
       req.erm.result = [];
@@ -91,7 +94,10 @@ export function operations(
   };
 
   const getCount: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     options.contextFilter(contextModel, req, (filteredContext) => {
       buildQuery(filteredContext.countDocuments(), req.erm.query)
@@ -106,7 +112,10 @@ export function operations(
   };
 
   const getShallow: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     options.contextFilter(contextModel, req, (filteredContext) => {
       buildQuery<Record<string, unknown> | null>(
@@ -136,7 +145,10 @@ export function operations(
   };
 
   const deleteItems: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     options.contextFilter(contextModel, req, (filteredContext) => {
       buildQuery(filteredContext.deleteMany(), req.erm.query)
@@ -150,7 +162,10 @@ export function operations(
   };
 
   const getItem: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     if (isDistinctExcluded(req)) {
       req.erm.result = [];
@@ -179,7 +194,10 @@ export function operations(
   };
 
   const deleteItem: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     if (options.findOneAndRemove) {
       options.contextFilter(contextModel, req, (filteredContext) => {
@@ -210,7 +228,10 @@ export function operations(
   };
 
   const createObject: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     req.body = filter.filterObject(req.body || {}, {
       access: req.access,
@@ -245,7 +266,10 @@ export function operations(
   };
 
   const modifyObject: RequestHandler = function (req, res, next) {
-    const contextModel = model;
+    const contextModel = req.erm.model;
+    if (!contextModel) {
+      return errorHandler(new Error('Model is undefined.'), req, res, next);
+    }
 
     req.body = filter.filterObject(req.body || {}, {
       access: req.access,
@@ -266,6 +290,7 @@ export function operations(
       const dst: Record<string, unknown> = {};
 
       for (const [key, value] of Object.entries(src)) {
+        // @ts-expect-error this is fine 🐶🔥
         const path = contextModel.schema.path(key);
 
         // @ts-expect-error this is fine 🐶🔥