a

backend/node_modules/mongoose/lib/helpers/model/applyStaticHooks.js

@@ -0,0 +1,33 @@
+'use strict';
+
+const { queryMiddlewareFunctions, aggregateMiddlewareFunctions, modelMiddlewareFunctions, documentMiddlewareFunctions } = require('../../constants');
+
+const middlewareFunctions = Array.from(
+  new Set([
+    ...queryMiddlewareFunctions,
+    ...aggregateMiddlewareFunctions,
+    ...modelMiddlewareFunctions,
+    ...documentMiddlewareFunctions
+  ])
+);
+
+module.exports = function applyStaticHooks(model, hooks, statics) {
+  hooks = hooks.filter(hook => {
+    // If the custom static overwrites an existing middleware, don't apply
+    // middleware to it by default. This avoids a potential backwards breaking
+    // change with plugins like `mongoose-delete` that use statics to overwrite
+    // built-in Mongoose functions.
+    if (middlewareFunctions.indexOf(hook.name) !== -1) {
+      return !!hook.model;
+    }
+    return hook.model !== false;
+  });
+
+  for (const key of Object.keys(statics)) {
+    if (hooks.hasHooks(key)) {
+      const original = model[key];
+
+      model[key] = hooks.createWrapper(key, original);
+    }
+  }
+};