How Knack Works
Design Your Database
Manage Your Records
Build Your Live Application
View and Share Your App
Do More With Knack
Connect Related Data
Users & Access
Calculations & Logic
Emails & Notifications
Search & Queries
Reporting & Dashboards
E-Commerce & Payments
Objects & Connections
Plan Your Connections: Complex Example
Working With Objects
Plan Your Connections: Simple Example
Plan Your Objects
Use Connections in Your App
Connecting Records Together
Connections: Troubleshooting & FAQs
Numeric Equation Functions
Date Equation Settings
Numeric Equation Settings
Text Formula Functions
CSV Format Guide for Importing
Working with Records
Deleting a Page That's Being Linked to
Working with Pages
Navigating the Page Preview
Printing Pages & PDFs
Table Column Settings
Source: Which Records Will the View Display
Using Action Links
Combining Fields from Connected Records in Views
Using Record Rules
Using Display Rules
Using Submit Rules
Users & Logins
Users and the Page Menu
Manage Roles & Permissions
Single Sign-On with Google, Facebook, Twitter, and Custom
Manage User Records
Logins and Registrations
Live App Security Settings: HIPAA Plans
Live App Security Settings
Tasks & Emails
How do I cancel my Knack account?
I'm over the storage limit for my account. How do I add more storage or get under the limit?
Need account access or to transfer account access because account owner or colleague left the company
I'm over the record limit for my account. How do I add more records or get under the limit?
Is there an option to pay via invoice, check, wire transfer, or something other than a credit card?
How do I freeze or pause my Knack account?
Where can I find a copy of my receipt or invoice?
How do I add more API calls to my account?
How do I change the favicon for my app?
How do I backup or export my apps and data?
How can I track what users are doing in my app?
How do I remove the "Powered by Knack" logo at the bottom of my app?
How do I give Builder access to a colleague or developer for one of my apps?
How do I white label my app?
How do I copy an app from my account to another account?
How do I show multiple dates on a calendar?
How do I add a logo to my app?
How do I find the most recent date from a connected object?
How do I create a field that always shows today's date?
Can I share or connect data between apps?
How do I create an "If, Then" or conditional equation?
How do I merge my apps, or copy pages, objects, or other app elements between my apps?
The menu isn't showing for my app on mobile devices. How do I fix that?
Is there a way to have new users be automatically logged-in after they register?
How do I bulk upload or import multiple files?
How do I move or copy fields or data from one object to another?
How can I show a customer's payment history if I'm collecting payments through my Knack app and through cash or check?
Is there a way to add a display rule to multiple columns at one time instead of having to update each column individually?
Do I need a separate user role object for my Vendors, Customers, Employees, Contacts, etc?
How can I set up my app so users see only their own data?
Can I combine two date fields into a single date field? For example, combining a start and end date into a single field?
Does Knack offer a service for building apps or have developers I can hire?
How do I bulk upload or import multiple images?
How can I change the color of something in my app?
Is it possible to display more than 100 records at a time on a table, list, or search view?
Can I migrate or transfer data from Zoho, Quickbase, or TrackVia?
Can I add chat or messaging to my app?
Can I sell my Knack apps?
Can I use Knack on mobile devices?
Do you have a sandbox or developer environment?
Can I send SMS or text messages using Knack?
Can I integrate Knack with other data, products, and services?
Can I create invoices and accept payments?
Can I have an app in a language besides English?
Can I email PDFs or other attachments to users with Knack?
Can I add Google Analytics to my Knack app?
Can I migrate my Access, Filemaker, SQL, or other databases?
Can I prototype for others?
Can I customize the look and feel of my Knack pages?
Can I use a barcode or credit card scanner with Knack?
Does Knack offer access to beta features?
How secure is Knack?
Does the signature captured through a signature field constitute a legally binding signature?
Does Knack offer a partner program?
How does Knack work on mobile devices? Is it mobile-friendly? Can users download my apps?
Is Knack GDPR compliant?
Storing sensitive data (credit cards, social security numbers, etc.)
Will Knack sign an NDA (Non-Disclosure Agreement)?
Which browsers do you support?
How do I batch download all of the images and files In my app?
I'm seeing an odd character when importing data. How can I get rid of it?
How do I update existing data using an import?
My import is failing or getting stuck. What do I do?
Can I undo or reverse an import?
I'm having trouble importing into a specific type of field. What can I do?
Some of my fields aren't importing correctly. How can I fix that?
I'm having trouble importing into a connection field. What can I do?
Can I import something other than data? Like objects, pages, views, etc?
My import is taking a long time. Can you take a look?
I'm getting an error when importing. What do I do?
Do the validation rules on fields trigger when importing data?
Can I schedule or automate imports?
Can my users import data from the live app, instead of going through the builder/back-end?
I am importing data for the first time. How do I do that?
Can I import data into more than one object at the same time?
How To Guides
Add Functionality to Your Live App
How To Create Discount Codes
Create an Add To Favorites Feature
How to Access Private Records Without a Login
Accept Payments in a Live App
Manage Your Records
Use an Edit Form to Create Records If They Don't Exist
Track Which User Last Updated a Record
Copy a Record Using Record Rules
Track When Records are Created and Updated
Create a Version History for Records
Use Zapier to Insert Connected Records
Work with Connected Records
How to Show Multiple Fields in Your Connection Drop-Down
Showing Parent-Child Records in the Live App
How to Create Dynamic Dropdowns in Forms
Add Read-Only Fields to a Form
How to Change the Layout of Forms
Create a Multi-Part Form
How to Allow Users to Add New Options in Forms
How to Add Instructions to a Form
How to Customize the Text on a Submit Button
How to Automatically Capture a User’s Location on a Form
How to Use URL Variables to Pre-Populate a Form
How to Add a Map to a Details View
How to Add Connection Links to Views
How to Add Inline Editing to a Table
Create a Print-Friendly Invoice Page
How to Click on an Image to Go to Another Page
How to Add Groupings to a Table
Users & Logins
Force Users to Reset Their Passwords
Save a User's Payment Method
Create a Single Login Page for Multiple User Roles
Add Read-Only Access For Users
Show Records Connected To The Logged-in User's Company Or Other Group
Show Records Connected to the Logged-in User
Create an Admin User Role to View All Records
Workflow & Automations
Add a Pipeline to Your App
Create a Registration Form with Limited Availability
Add Stages to Your App
Store Multiple Images or Files for Individual Records
Use Multiple Image Sources for a Single Image Field
Create a Button or Link that Updates a Field to a Custom Value
Notify a User That an Item is Ready for Review
Add Assignments to Your App
Approve New Records Before Displaying Them
Add Notification & Reminder Emails to Your App
Add Status Indicators to Your App
Logic, Equations & Formulas
Start an Auto Increment Field from Any Number
Display a Message When a Deadline is Approaching
Generate Simple Numeric Barcodes Automatically
How to Set a Random ID
Calculate Age in Years from a Birthday
How To Number Line Items
Show Upcoming Birthdays
How to Extract the Start and End Dates from a Date Field
How to Display Multiple Date Formats Using a Single Date Field
Reports, Queries, and Summaries
Build an Inventory Manager App
Build a Quiz App
Build a Warehouse Manager App
Build a Member Directory
Build an Orders App
Build a Map Directory or Store Locator App
Images & Files
Manage Your Account
Manage Your Account
About Knack Accounts
Account Plans and Billing
Managing Your Apps
Managing Your Account Settings
Sharing Apps with Shared Builders
App Settings: Map Provider
Script Attack Protection: Whitelisted Custom Code Elements and Attributes
Script Attack Protection: Protected Areas
Security & Infrastructure
Security Best Practices
Builder Security Settings for All Knack Plans
Builder Two-Factor Authentication
Table of Contents
Updated by Sarto Jama
How the Schema Section Works
The first step in building your app is defining your data.
You do this in the Schema section of your builder, which gives you tools to define the data your app will use and store that data in a database.
You can access the schema section at any time by clicking the "Schema" tab on the left-side of the Builder:
Objects and Fields
Knack uses objects and fields to define your data.
You'll create fields for each piece of data you want to store and manage. For example, if you wanted to build an app to manage Contacts, you may include fields for name, email, and phone number.
These fields are grouped into objects. Think of an object like a spreadsheet, and each field like a column in that spreadsheet.
Here’s an example of a Inventory Manager app, with a Products object selected for editing:
All your objects are listed on the left. Click an object to edit its fields and settings. Add a new object with the green "+" button next to the ‘Object’ label.
- The selected object's fields are listed to the right. Click a field to edit and format it. Add fields by clicking the “Add Field” button above the field list then clicking on the type of field you want to add (like short text or number).
- The app’s user roles are stored here. They work similarly to other objects, but include special fields for managing user logins like Name, Email, Password, User Status, and User Roles. User roles are optional and may not be needed if you don't need your users to log in to access your app.
Connecting Objects Together
Most apps will need more than one object. When this is the case, these objects will likely be connected to one another.
Connections define how the records in one object will relate to records in another object. Here are some examples of different connections you can create:
- Many employees can be connected to one company.
- One student can be connected to one application.
- Many managers can be connected to many projects.
Each object’s connections are listed to the right:
When you add a new connection, it creates a special connection field in that object. These fields can be used like any other field throughout your app. If you add a connection field to a form, it will operate as a "look-up" where you can select a record to connect to:
Connections will open up powerful functionality you can add to your apps:
- Displaying parent-child records in your interface. For example, click on a company and view all the employees connected to that company
- Running formulas to find the totals and averages of child records. For example, add up all the employee salaries for each company.
- Showing records connected to the logged-in user. For example, have each company log in and just view the employee records connected to their company, rather than viewing all the employee records stored for every company.Click here to learn more about Connections.
What Should My Objects Be?
For most applications, defining the objects is very straightforward. If this is less obvious here are some good ways to think about your objects:
- Think about your fields. It can help by starting to think about the individual type of data you have. List all the fields your app will need to display and manage, and then group them into the most obvious objects.
- Think about your pages. If you're adding forms, what inputs will those forms contain? If you want to display a table of records, what will the columns be? Ask yourself if each of the inputs or columns sound like they belong to the same group. If not, you may want to add them to different objects.
- Think about single versus plural. If you have something that can be plural grouped alongside something that is single, then you may want break up the plural items into a separate object. For example, let's say you want to track a company (single), but each company can have multiple employees (plural). In this case, it makes sense for employees to be a separate object that would connect to the company.
- Think about repeating data. If you are repeating the same information over and over again in your records, you may want to separate that info into its own object and connect it to your original records instead. This way, you will only have to update it once.
Working With Records
Once you add your objects and fields, you can start to store records for each object.
Click on the Records tab on the left side of the page to access records for each object:
Each record will be actual data based on the fields you added for that object. For example, if you added an image field, you'll be able to upload an image for each record.
Records can be added to the database directly in the builder by clicking the "Add Record" button or by importing the data via CSV. Records can also be added through the live application using forms.
Note that some apps make sense to populate directly through the builder:
- Record searches
- Product catalogs
- Business directories
The primary purpose of these apps is to display or search records, so you can add those records directly to the database.
Other apps will add records when your users fill out forms in the live application:
- Parents filling out a form to register children for a camp
- Job hunters filling out a form to apply for open jobs
- Employees filling out forms to complete a project
These apps are using forms to add and manage records, so much of the database will be populated by the app itself.
Importing From Spreadsheets
You can quickly get your data into your app by importing spreadsheets. Records can be imported into an existing object or to create a new object.
To add to or update an existing object, select the object from the left-hand menu, then click the "Records" tab and the "Import" link in the top bar:
To add a new object with an import, click on the Schema tab on the left side of the screen, then click on the green "+" button above the list of objects:
Here, you will have the option to create a new object by import:
User records are special records that represent users who can log in and access your app.
A user record has required fields for Name, Email, Password, and others that make it possible to manage logins. Otherwise, they operate just like normal objects: you can add additional fields and connect them to other objects.
Click the "Enable Users" link to activate user logins:
How Will My App’s Pages Work With My Objects and Fields?
Your app’s pages are what your users see to view and update the records in your database. Each page is made up of views: visual elements like tables, forms, and searches.
When you add a view, you’ll select which object that view works with. All the fields from that object will then be available to add to the view. For example, if you added a table to display Company records, you could add any of the Company fields as columns in that table.