flow like the river

BACK_BACK/node_modules/mongoose/lib/plugins/saveSubdocs.js

@@ -0,0 +1,66 @@
+'use strict';
+
+const each = require('../helpers/each');
+
+/*!
+ * ignore
+ */
+
+module.exports = function saveSubdocs(schema) {
+  const unshift = true;
+  schema.s.hooks.pre('save', false, function saveSubdocsPreSave(next) {
+    if (this.$isSubdocument) {
+      next();
+      return;
+    }
+
+    const _this = this;
+    const subdocs = this.$getAllSubdocs();
+
+    if (!subdocs.length) {
+      next();
+      return;
+    }
+
+    each(subdocs, function(subdoc, cb) {
+      subdoc.$__schema.s.hooks.execPre('save', subdoc, function(err) {
+        cb(err);
+      });
+    }, function(error) {
+      if (error) {
+        return _this.$__schema.s.hooks.execPost('save:error', _this, [_this], { error: error }, function(error) {
+          next(error);
+        });
+      }
+      next();
+    });
+  }, null, unshift);
+
+  schema.s.hooks.post('save', function saveSubdocsPostSave(doc, next) {
+    if (this.$isSubdocument) {
+      next();
+      return;
+    }
+
+    const _this = this;
+    const subdocs = this.$getAllSubdocs();
+
+    if (!subdocs.length) {
+      next();
+      return;
+    }
+
+    each(subdocs, function(subdoc, cb) {
+      subdoc.$__schema.s.hooks.execPost('save', subdoc, [subdoc], function(err) {
+        cb(err);
+      });
+    }, function(error) {
+      if (error) {
+        return _this.$__schema.s.hooks.execPost('save:error', _this, [_this], { error: error }, function(error) {
+          next(error);
+        });
+      }
+      next();
+    });
+  }, null, unshift);
+};