NodeJS Tutorial in Hindi 2023 - 🔴 #20: Mongoose Built-In Validation using MongoDB in (NodeJS) Express App in Hindi in 2020

Welcome, MongoDB Built-In Validation using Mongoose in Express App in Hindi in 2020 MongoDB Validation using Mongoose Before we get into the specifics of validation syntax, please keep the following rules in mind: Validation is defined in the SchemaType Validation is middleware. Mongoose registers validation as a pre('save') hook on every schema by default. You can disable automatic validation before save by setting the validateBeforeSave option You can manually run validation using doc.validate(callback) or doc.validateSync() You can manually mark a field as invalid (causing validation to fail) by using doc.invalidate(...) Validators are not run on undefined values. The only exception is the required validator. Validation is asynchronously recursive; when you call Model#save, sub-document validation is executed as well. If an error occurs, your Model#save callback receives it Validation is customizable 😍 Mongoose Validation: https://mongoosejs.com/docs/validation.html 😍 Check my Instagram to Contact Me: https://www.instagram.com/vinodthapa55 ✅ NodeJS Tutorial in Hindi 2020: https://www.youtube.com/playlist?list=PLwGdqUZWnOp00IbeN0OtL9dmnasipZ9x8 ✅ Express JS Tutorial In Hindi in 2020: https://www.youtube.com/playlist?list=PLwGdqUZWnOp3Vqww2cL5KbDkShj4NMRzk ************* Must Watch Videos For Web Development ************* ➡️ ReactJS Tutorial in Hindi 2020 Playlist Link: https://www.youtube.com/playlist?list=PLwGdqUZWnOp3aROg4wypcRhZqJG3ajZWJ ➡️ React JS Project Netflix App Part #1 in Hindi in 2020: https://youtu.be/HRhJVGjIraE ➡️ Install VS Code for ReactJS LINK: https://www.thapatechnical.com/2020/05/install-reactjs-windows-install-nodejs.html 😍😍 Check Programming Videos in One Hour👇 ➡️ Complete Reactjs in One video here https://youtu.be/43IbFDSVdB0 ➡️ HTML in One Video: https://youtu.be/pN7BFLfSjFw ➡️ CSS in One video: https://youtu.be/hkQv0NIxKQY ➡️ CSS FlexBox in 30 Minutes: https://youtu.be/6L-PAmZajfA ➡️ JavaScript in One video: https://youtu.be/PODgPW-hbfU ➡️ ECMAScript 6 in One Video: https://youtu.be/Iek4DtRobLA ➡️ HTML5 in one video: https://youtu.be/4V0-YpO-KZo ➡️ CSS3 in one video: https://youtu.be/TFrFx7H5ZI8 ➡️ Bootstrap4 in One video: https://youtu.be/yZnNnvXO8HI ➡️ Jquery in One video: https://youtu.be/PNvyPEQ0y-I ➡️ JSON in one video: https://youtu.be/bMqevPKAPD4 ➡️ ReactJS in one video: https://youtu.be/43IbFDSVdB0 ➡️ PHP in One Video: https://youtu.be/3024Kc6SDJ0 ➡️ NodeJS in one video: https://youtu.be/ipnWAKoiBt ➡️ MySQL in one video: https://youtu.be/5bFxbwjN-Gk *********** CLICK HERE TO WATCH ************* ➡️ Fetch API in JavaScript: https://youtu.be/TojSXOuGUW4 ➡️ AJAX tutorial for beginners in Hindi: https://www.youtube.com/playlist?list=PLwGdqUZWnOp3ZgLj8upMGSRSC1ezBfEZs ➡️ Template literals (Template strings) in ES6 in JavaScript in Hindi: https://youtu.be/Qcph3GB1JFs ➡️ Async Await in JavaScript in Hindi: https://youtu.be/hFLXE5-JCcs ➡️ Promises in JavaScript in Hindi: https://youtu.be/xGBhmi4wwMI ➡️ Callback Hell in JavaScript: https://youtu.be/fr67u98nckk ➡️ Advanced JavaScript in Hindi Playlist: https://www.youtube.com/playlist?list=PLwGdqUZWnOp0hSGwasCjbrWSPrEKqB_kz&disable_polymer=true ➡️ ECMAScript Tutorial in Hindi 2020: https://www.youtube.com/playlist?list=PLwGdqUZWnOp19VX-DM4oHtmWhDfWblFh- ➡️ ES5 & ES6 | ECMAScript 6 in One Video in Hindi: https://youtu.be/Iek4DtRobLA ➡️ JavaScript Game Development Series in 2020: https://www.youtube.com/playlist?list=PLwGdqUZWnOp1Ub0K1CBuLxLOEN6wTq2bg ➡️ Source Code Link: https://www.thapatechnical.com/2019/11/how-to-get-source-code.html ➡️ Top 5 Programming Languages in 2020: https://youtu.be/czroY5nAD0c ➡️ Ludo Game JavaScript Link: https://youtu.be/_tlncjn1JpU ➡️Plz show some love to My Siter Youtube Channel and Plz Subscribe Link: https://www.youtube.com/channel/UCEst8yZ12JEYsSVVXmtU7GQ ***************** MUST WATCH VIDEOS ****************** ➡️ How to become a Full Stack Developer 2020: https://youtu.be/etZ4jq_YjyM ➡️ How To Become a Web Developer 2020: https://youtu.be/Ur9LGVT-GXs ➡️ How JavaScript Works: https://youtu.be/VaBP6_pBOgM ➡️ Follow me on Instagram: https://www.instagram.com/vinodthapa55/ Make Website Responsive Using Media Queries in One Video in Hindi | Web Design Tutorial in Hindi ➡️ Link: https://youtu.be/cKR9gzco3Kc Guys, Please support my channel by SUBSCRIBE to my channel and share my videos in your Social Network TimeLines. Don't Forget to Follow me on all Social Network, Website Link: https://www.thapatechnical.com Instagram Link: https://www.instagram.com/vinodthapa55 Facebook Link: https://www.facebook.com/vinodthapa55 Twitter Link: https://twitter.com/vb55thapa Facebook ThapaTechnical Page Link: https://www.facebook.com/vinodbahadurthapa/?ref=aymt_homepage_panel&eid=ARCTi5kdE1POliSOXnW51qZdo6NcpcSOqrioqut1KDac_CfgY5OCey-vcHlgRDgc_OK6eYNFCF_Rrfiq