Django Tutorial #17: Django Form Submission Flow & Built-in Validators Explained by скачать в хорошем качестве

Django Tutorial #17: Django Form Submission Flow & Built-in Validators Explained by

In Session 17 of the BasicToTop Django Tutorial Series, we go deeper into what happens in the backend when a user clicks the Submit button and how Django form validation works using built-in validators. This session focuses on understanding: How request data reaches the view function How Django processes GET and POST requests How form.is_valid() works internally How to use Django’s built-in validators How to write custom validators 🔁 What Happens After Clicking the Submit Button? When the user clicks the Submit button: 1️⃣ Browser sends an HTTP POST request 2️⃣ Request reaches the mapped URL 3️⃣ Django calls the corresponding view function 4️⃣ Form data is available inside request.POST 5️⃣ Form instance is created using POST data 6️⃣ form.is_valid() triggers validation 7️⃣ Validators are executed field by field 8️⃣ Errors are returned if validation fails 9️⃣ Cleaned data is available if validation passes 🧠 Topics Covered in This Session ✅ How form submission works internally ✅ Request → URL → View → Form flow ✅ Difference between GET and POST in backend ✅ What happens inside form.is_valid() ✅ Built-in validators in Django ✅ Custom validator function ✅ Field-level validation using validators ✅ Combining validators with clean() method 📌 Line-by-line meaning: request.method == 'POST' → checks form submission ContactUsForm(request.POST) → binds user input form.is_valid() → runs all validators cleaned_data → safe, validated data ✅ Built-in Validators in Django Django provides ready-made validators to enforce rules easily. Examples: MinLengthValidator MaxLengthValidator 📘 What You Learned in Session 17 ✔ How form submission reaches backend ✔ How Django processes POST requests ✔ How validators work internally ✔ How to write and use custom validators ✔ How Django stops invalid data automatically 🌟 About BasicToTop BasicToTop is here to help you move forward — from basic to top. 🔔 Subscribe for more Django tutorials 👍 Like the video if it helped you 💬 Comment your doubts — I reply personally Website: https://basictotop.in Github: https://github.com/BasicToTop Facebook:   / basictotopfbpage   Instagram:   / basictotop   #django #python #webdevelopment #beginnerdjango #basictotop #BasicToToop