Reusing Old Form Values After A Validation Error
In this lesson, we'll learn how we can easily repopulate our form input values with their previously submitted values when our VineJS validator finds and sends back an error.
- Author
- Tom Gobich
- Published
- Apr 09
- Duration
- 2m 3s
Developer, dog lover, and burrito eater. Currently teaching AdonisJS, a fully featured NodeJS framework, and running Adocasts where I post new lessons weekly. Professionally, I work with JavaScript, .Net C#, and SQL Server.
Adocasts
Burlington, KY
Transcript
Reusing Old Form Values After A Validation Error
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(upbeat music)
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So as we saw whenever we were inspecting our flash messages,
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it actually has the old values
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that we submitted our form with originally
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on the flash messages itself available to us.
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So we can use that information
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to actually pre-populate the information back
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after we've performed validation
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so that we don't have to sit here
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and retype that information over again,
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attempting to use valid data.
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So let's hide our browser back away,
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jump back into our register page,
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scroll back up, and let's start with our full name.
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What we wanna do is provide a value into the input.
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We'll do double curly braces
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so that we can reach into our flash messages
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and we'll get the field name, which would be our full name.
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Now, if we save here, jump back into our browser,
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you'll see that we're gonna get undefined.
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And that's because the flash message
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is returned back undefined
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because it doesn't have a value presently.
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So let's hide that back away.
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Then we can do or an empty string there.
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Okay, we'll give that a save, jump back into our browser,
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and now that undefined is gone
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and our value is now just an empty string.
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Let's type out John.
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Let's retest with invalid data
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so that we can test this flow and hit submit.
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So there we go.
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So we see that our John full name is still provided
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and we haven't applied this yet to our email.
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And for security reasons,
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it's going to exclude password information.
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So even if we were to add it to our password,
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it would not be populated.
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And just like everything else within this validation flow,
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AdonisJS has provided helpers to us
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to make this even more streamlined.
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So let's hide our browser back away
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and we can replace this flash messages get call
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with just a method called old
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and provide in a key for the old value
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that we want to reach for.
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And this will essentially do the exact same thing,
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just in a more streamlined method.
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So let's go ahead and scroll down to our email
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and apply it there as well.
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So we get a value old email or an empty string
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if it's not found.
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And just to show you that our password is excluded from this,
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we'll go ahead and add it here as well.
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So old password or an empty string.
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Okay, let's jump back into our browser
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and give it one more failed test.
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So John [email protected] and some invalid password.
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We'll hit enter.
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And there we can see we still have John,
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we still have our email,
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but our password there was excluded.
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And so that's how we can reuse values
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that were submitted with the form originally,
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despite the validation failing.
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Introduction
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Fundamentals
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2.0Routes and How To Create Them5m 23s
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2.1Rendering a View for a Route6m 29s
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2.2Linking Between Routes7m 51s
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2.3Loading A Movie Using Route Parameters9m 17s
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2.4Validating Route Parameters6m 6s
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2.5Vite and Our Assets6m 38s
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2.6Setting Up Tailwind CSS9m 5s
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2.7Reading and Supporting Markdown Content4m 32s
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2.8Listing Movies from their Markdown Files8m 51s
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2.9Extracting Reusable Code with Services7m 4s
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2.10Cleaning Up Routes with Controllers4m 52s
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2.11Defining A Structure for our Movie using Models9m 38s
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2.12Singleton Services and the Idea of Caching6m 11s
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2.13Environment Variables and their Validation4m 16s
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2.14Improved Caching with Redis10m 44s
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2.15Deleting Items and Flushing our Redis Cache6m 46s
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2.16Quick Start Apps with Custom Starter Kits6m 28s
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2.17Easy Imports with NodeJS Subpath Imports8m 40s
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Building Views with EdgeJS
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3.0EdgeJS Templating Basics8m 49s
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3.1HTML Attribute and Class Utilities6m 9s
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3.2Making A Reusable Movie Card Component10m 24s
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3.3Component Tags, State, and Props4m 53s
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3.4Use Slots To Make A Button Component6m 56s
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3.5Extracting A Layout Component5m 13s
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3.6State vs Share Data Flow2m 59s
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3.7Share vs Global Data Flow6m 7s
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3.8Form Basics and CSRF Protection6m 13s
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3.9HTTP Method Spoofing HTML Forms3m 3s
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3.10Easy SVG Icons with Edge Iconify7m 57s
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Database and Lucid ORM Basics
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4.0Configuring Lucid and our Database Connection4m 3s
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4.1Understanding our Database Schema9m 35s
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4.2Introducing and Defining Database Migrations18m 35s
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4.3The Flow of Migrations8m 28s
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4.4Introducing Lucid Models5m 43s
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4.5Defining Our Models6m 49s
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4.6The Basics of CRUD11m 56s
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4.7Defining Required Data with Seeders11m 11s
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4.8Stubbing Fake Data with Model Factories13m 48s
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4.9Querying Our Movies with the Query Builder15m 30s
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4.10Unmapped and Computed Model Properties3m 24s
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4.11Altering Tables with Migrations7m 6s
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4.12Adding A Profile Model, Migration, Factory, and Controller2m 57s
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4.13SQL Parameters and Injection Protection9m 19s
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4.14Reusable Query Statements with Model Query Scopes8m 11s
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4.15Tapping into Model Factory States9m 15s
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4.16Querying Recently Released and Coming Soon Movies4m 59s
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4.17Generating A Unique Movie Slug With Model Hooks7m 59s
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Lucid ORM Relationships
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5.0Defining One to One Relationships Within Lucid Models5m 49s
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5.1Model Factory Relationships2m 54s
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5.2Querying Relationships and Eager Vs Lazy Loading5m 17s
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5.3Cascading and Deleting Model Relationships5m 16s
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5.4Defining One to Many Relationships with Lucid Models6m 56s
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5.5Seeding Movies with One to Many Model Factory Relationships5m 24s
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5.6Listing A Director's Movies with Relationship Existence Queries8m 41s
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5.7Listing and Counting a Writer's Movies8m 41s
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5.8Using Eager and Lazy Loading to Load A Movie's Writer and Director5m 18s
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5.9Defining Many-To-Many Relationships and Pivot Columns9m 48s
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5.10Many-To-Many Model Factory Relationships4m 50s
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5.11A Deep Dive Into Relationship CRUD with Models18m 5s
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5.12How To Create Factory Relationships from a Pool of Data13m 55s
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5.13How To Query, Sort, and Filter by Pivot Table Data9m 47s
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Working With Forms
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6.0Accepting Form Data12m 15s
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6.1Validating Form Data with VineJS9m 29s
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6.2Displaying Validation Errors and Validating from our Request7m 16s
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6.3Reusing Old Form Values After A Validation Error2m 3s
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6.4Creating An EdgeJS Form Input Component5m 28s
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6.5Creating A Login Form and Validator5m 1s
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6.6How To Create A Custom VineJS Validation Rule9m 7s
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Authentication & Middleware
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The Flow of Middleware7m 49s
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Authenticating A Newly Registered User4m 14s
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Checking For and Populating an Authenticated User2m 10s
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Logging Out An Authenticated User2m 24s
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Logging In An Existing User6m 54s
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Remembering A User's Authenticated Session6m 55s
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Protecting Routes with Auth, Guest, and Admin Middleware5m 36s
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Filtering and Paginating Queries
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