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Build your first Web App

Build a Responsive Web App

1 Introduction

This guide will help you gain an understanding of the key features and components of Stack9 using a hands-on demonstration of the system.

1.1 Getting to know Stack9

Stack9 exists of 2 components or websites: a front-end application that your end-users will see and interact with, and a back-office console application where you will configure and build the application. Both are browser-based.

In this guide you will learn how to add an entity to your Domain Model (a visual model that describes your app’s information or data in an abstract way). You will also get an understanding of how the Query Library allows you to build a toolbox of queries using Connectors between your data and the screens on it which that data is presented. 

You will also set up Modules that will allow you to browse the data in your application via Screens, as well as validate information you capture using Automations. Lastly you will create a Document Template to allow you to export data in a user-friendly manner.

Lastly you will use the companion front-end application to browse the changes you made and create, update and print information in your application.

2 Prerequisites

You will need to have the following in place before continuing:

  1. Browser access to a running Stack9 console app
  2. Admin permissions to the console to allow you to configure and update components relevant to this guide.

3 Choosing an App template

More details to follow...

4 Exploring the Stack9 Console

Before you start working in your app's console, take a look a look around to familiarise yourself with the various components; some of which you will be using in this guide.

Launch the Stack9 Console in your browser (from the following link): xxxx-console.app.stack9.dev and login with your supplied user credentials. If using single sign-on (SSO), you may need to accept your organisation policies the first time you do so.

Once signed in you will see the Console home page with the following navigation options:


4.1 Data Hub

Possibly too detailed? Happy to compact these down into a single para if too detailed for this section...

4.1.1 Connectors

Connectors allow your application to communicate with a variety of internal and external data sources. Stack9 comes with a set of preconfigured connectors already installed and configured ready to use.

image-1687230407243.png

See Connectors Reference page for more detailed information

For this simple CRM demonstration we will focus on using the Stack9 API connector.

You can also create and configure your own connectors or have April9 develop custom connectors for almost any use case. 

4.1.2 Domain Entities

This is where all the tables for your application will be kept. Think of these tables as storage folders for data created and managed within your application. Entities can be linked to each other using relational database concepts. 

Stack9 comes with a default set of tables (native entities) that cannot be changed or removed but you can extend them with your own custom fields. Click here for an explanation of each native entity.

image-1687230623311.png

Custom entities are the tables that will make up your own domain model. This guide will take you through creating some examples.

See the Domain Model section for more detail on how to set up your domain's entities.

4.1.3 Query Library

The Query Library is a central store for all the instructions your application will need in order to create,Create, retrieve,Read, updateUpdate and deleteDelete data in your domain model - often referred to as CRUD operations.

image-1687230656941.png

 It is recommended that you follow a set naming convention when creating queries. For example: get<entityname>List for queries that return a summary list of records in a table and get<entityname>Details for the full details of a specific record.

Queries can also be arranged in folders for easier management, particularly as your application grows in size.

4.2 App Builder

4.2.1 Modules

This where you will set up and manage the overall navigation and menu of your application. You can separate the areas of your application into business units, departments or by role to group similar information together.

image-1687230924501.png

4.2.2 Screens

Screens are the primary interface through which users of your application will interact with the underlying domain model and data contained within it.

image-1687230888451.png

4.2.3 Automation

The Automation section is for more advanced concepts where you can configure particular events to happen when data changes. For example, when a record is created or updated, some specified validation rules can be run to ensure required fields are included or data is captured with a valid format; such as an email address.

image-1687236855075.png

4.2.4 Document Templates

Data in your application can be printed or exported in a printable format. This section allows you to set up and configure templates and master templates that will be accessible from record and list menus in areas of your application that you specify.

image-1687236894395.png

Master templates allow you to add re-usable content that can be used in other documents templates, such as a logo and header and footer information, removing the need to maintain them in each document template.

4.3 Settings

General settings and configuration of your application... more details to follow

4.3.1 General Settings

This is where you can control the site-wide settings of your application, such as its title, logo and branding, icons and themes.

4.3.2 Version Control

Your application will grow and change over time. This section allows you to set up and control versions of your application that can be released in a staged and controlled manner. You will also be able to downgrade your application to an older version in some situations.

4.3.3 Environment Variables

Your application can be deployed to different environments for different purposes or audiences. For example, a Development (Dev) environment with limited access that you and your development team can use to start setting up or used when developing new entities, features or screens prior to release into Production. Or a UAT environment where stakeholders can test the application or any new features for acceptance prior to release.

A place to store information and keys that need to be different on each of your environments.


5 Creating your app's Domain Model

A Domain Model is central to your application's data structure. It holds a blueprint for the tables that will hold all the information and content in your app.

5.1 Understanding the Domain Model

The domain model is a visual representation of your app’s database. The Simple CRM domain model we're using for this guide looks as follows (too detailed - will review and simplify):

5.2 Creating an Entity to Store Information

We'll start by creating an Account (or Customer?) entity to hold information about organisations whose information and related interactions and entities the system will hold.

  1. In the Console, choose Data Hub > Entity Models and choose Add Entity Model.
  2. You will be prompted to enter the following information:
    • Name: Account
    • Entity Key: account - lowercase is the preferred format
    • Pluralised Name: Accounts - this is how the entity will be referred to in titles and menus where a plural version of the entity is required
    • Is active: Checked
    • Leave the following fields at their default values for now:
      • Allow Comments: checked
      • Allow Tasks: checked
      • Attachment Max Size: empty
      • Attachment File Types: empty
      • Folder: empty
  3. Click Create.

Your entity is now created and will be listed in the Custom folder. Next you need to add fields to the entity:

  1. Open the entity (or click Edit account entity after the last step above) and click the Add field button to bring up a list of field types to choose from.
  2. Choose Text and you will then be prompted to enter the following information:
    • Name: Company Name
    • Field ID: company_name - lower case with no spaces is recommended
    • Placeholder: this is optional but can be used to prompt users when they capture information, e.g. Enter the business's Trading Name
    • This Field is Required: Checked
    • The remaining fields are optional and will be covered in other guides so you can leave them at their default values.
  3. Click Create  
  4. Repeat the Add field process to create the following fields in the Account entity:
    • Account No: use the Number field type (set Precision to 0 as this will be normally be a whole number)
    • Status: use the Choice field type and under Values available enter the following values:
      • Active
      • Inactive
      • Archived
    • Notes: use the Rich Text field type
  5. You can use the Settings option to change any of the fields you have already created. You can also drag the fields to re-order them.
  6. Once you are done adding fields, click Save changes.

Refer to Field Types page for details of the different types of field you can add to your entity. 

Next we will create a second entity to hold customer (or account) contact information:

  1. Choose Add Entity Model and name it Contact following the steps above.
  2. Then add the following Text fields to it:
    • Full Name (read-only)
    • First Name (required)
    • Last Name (required)
    • Phone
    • Mobile No.

Next we will add a field that will link the contact to the an account. As an account could have many contacts, we don't want to make users enter the same information for each, so instead we will allow users to choose the account from a dropdown menu.

  1. Add a field using the N-1 Reference (single dropdown) field type with the following details:
    • Name: Account
    • Field ID: account_id (the _id suffix is important)
    • Placeholder: Choose account...
    • Select your entity: choose Account from the list
    • Label Property: Company Name
  2. Click Create
  3. Drag the Account field to be first in the list so it will always appear at the tope of the form by default.
  4. Then make sure you click Save changes to update the entity.

Now that we have a contact entity linked to the account entity, we can go one step further and allow the account entity to list all contacts for the account.

  1. Go back to the Entity Models list and click the account entity to edit it.
  2. Click Add Field and choose 1-N Reference (grid).
  3. Enter the following information:
    • Name: Contacts
    • Field ID: contacts - important to use pluralised name of entity you are using here
    • Select your Entity: Contact
    • Foreign Key Field: account_id
  4. Click Create and then save the entity using the Save changes button.

You have now created 2 simple entities that we will use in the next section: Query Library

A simple graphical representation of the entities you created will look like this:

6 Creating queries using the Query Library

Queries allow you to create instructions that send data to and from your app's underlying domain entities. To do this you will use connectors and some simple, human-readable JSON code.

6.1 Understanding connectors

Connectors allow your application to communicate with a variety of internal and external data sources. For example, the Stack9 API connector allows you to read and update information in Stack9's own SQL database. Stack9 comes with a set of preconfigured connectors already installed and configured ready to use.

We will use the Stack9 API connector as a means to connect the data you capture in your domain entities to a screen that your end-users will interact with.

6.2 Creating queries for simple CRUD operations

In this section you will create one query that will return a list of accounts and a separate one that will get the details of a specific account together with any contacts linked to it.

  1. In the Console, choose Data Hub > Query Library and click New Query.
  2. Change the title to getAccountList.
  3. Choose Stack9 API from the Connector dropdown.
  4. From the Request dropdown, choose POST /account/search.
  5. For QueryParams, make sure the values are as follows:
    • page: {{page}}
    • limit: {{limit}}
    • method: leave empty
  6. In the BodyParams field you will create a simple JSON object that specifies which fields from the Account entity to return, together with a condition to exclude any deleted records. Copy and paste the following code:
    {
  "$select": [
    "company_name",
    "account_no",
    "status",
    "notes"
  ],
  "$where": {"_is_deleted" : false},
  "$withRelated": ["contacts"]
}

  7. Click Save.
  8. Test your query by clicking the Run button (or use Ctrl-Enter).

Repeat the above steps to create another query called getContactList:

  1. Again, use Stack9 API as the connector.

  2. From the Request dropdown, choose POST /contact/search.
  3. Use the same QueryParams as before.

  4. In the BodyParams copy and paste the following JSON:

    {
  "$select" : [
    "account_id",
    "account.company_name",
  	"first_name",
    "last_name",
    "phone",
    "email"
  ],
  "$where": { "_is_deleted" : false},
  "$withRelated": []
}

    The account.company_name field will use the account_id field in the Contact entity to read the Company Name from the associated account.

  5. Click Save.

Next, create another query named getAccountDetails that will return all the details of the account together with a list of contacts linked to it:

Is a separate query required for simpleCRUD screen still? Or do I just need a single getAccountList query?

  1. Use the Stack9 API connector again.
  2. From the Request dropdown, choose POST /account/search.
  3. QueryParams can be left empty.
  4. Use the following for the BodyParams:
    {
  "$select" : [
    "company_name",
  	"account_number",
    "status",
    "notes"
  ],
  "$where": {
    	"_is_deleted" : false,
		"id":{{id}}
	},
  "$withRelated": [
  	"contact"
  ]
}

    The id: {{id}} condition tells the query to return only a single account based on a variable that will be passed in.

  5. Click Save.

Repeat the process to create a getContactDetails query using the following BodyParams:

{
  "$select" : [
    "account_id",
    "account.company_name"
  	"full_name",
    "phone",
    "email"
  ],
  "$where": {
    	"_is_deleted" : false,
		"id":{{id}}
	},
  "$withRelated": []
}

You now have 4 queries ready to be used in the next section.

Advanced topic: add filters to your query - maybe this should be moved to a separate section/page?

  1. Edit the getAccountList query and in the right hand pane, look for the Filters section.
  2. Click Add Filter and capture the following information:
    • Label: Company
    • Field ID: company
    • Query Filter Type: Array
    • Field: company_name
    • Use sub query: leave unchecked
    • Filter Render: Select (multiple values)
    • Data Source Type: Query distinct
    • Query Library: Import from query libraries
    • Query Name: Company
    • Query: getAccountList
    • Sequence: 1
    • Filter Section: leave empty
  3. Make sure to Save the query.

7 Creating your app's User Interface

An application is of no use unless your users can interact with it through their web browser. This section covers how to create a series of simple screens that will allow users to:

  • Add new accounts
  • List those accounts in a table or grid
  • Add a new contacts to an account

First though, we will create a module into which these screens will be added.

  1. In the Console, choose App Builder > Modules and click Create New.
  2. Enter the following required info:
    • Name: CRM
    • App Key: crm (hint: use lowercase as a standard and separate words with an underscore)
    • Node Type: appNode
    • Leave the rest of the fields blank for now.
  3. Click SaveCreate.
  4. Next, click Edit crm app (or choose it from the module list if you have returned to the list) and you will see 3 tabs: Configuration, Navigation and Code View
  5. Choose Navigation and hover over the CRM box and click the + button then choose Link.
  6. Enter the following information:
    • Label: Accounts
    • Node Key: accounts
    • Link: accounts/list
  7. Click Update to save your changes to the link
  8. Then choose Save 

Next we will create a screen to list, create and update the details of Account records.

  1. In the Console, choose App Builder > Screens and click Create New.
  2. Choose Simple CRUD as the screen type and enter the following required information.
    • Title: Accounts
    • Key: accounts
    • Route: accounts
    • App: CRM
    • Entity Key: choose Account from the dropdown
  3. Next, in Grid Configuration, choose getAccountList from the list of queries you added in the previous section.
  4. In the Columns section check the boxes next to the following fields:
    • company_name
    • account_no
    • status
    • Note rich text fields cannot be listed in a Grid
  5. Then, in the Form Configuration section, choose getAccountList as well.
  6. In the When creating section, check the box next to the following fields:
    •  company_name
    • account_number
    • status
    • notes
  7. Note, you can also drag the fields to re-order them if you like.
  8. Select the Customize update fields radio button.
  9. Check the box next to all fields including contacts.
  10. Click Save.

Once you have created your screen, you will need to link it to your module navigation

Repeat the process above to create another screen for Contacts using the getContactList and getContactDetails queries.

  1. In the Console, choose App Builder > Screens and click Create New.
  2. Choose Simple CRUD as the screen type and enter the following required information.
    • Title: Contacts
    • Key: contact
    • Route: contact
    • App: CRM
    • Entity Key: choose Contact from the dropdown
  3. Next, in Grid Configuration, choose getContactList from the list of queries you added in the previous section.
  4. In the Columns section use Add new field to add fields for:
    • Field: Account / Key: account.company_name
    • Field: First Name / Key: first_name
    • Field: Last Name / Key: last_name
    • Field: Phone / Key: phone
    • Field: Email / Key: email
  5. Then, in the Form Configuration section, choose getContactDetails from the list of queries you added in the previous section.


7.2 Test the application out

Need a demo site to confirm the steps below

Use the application to add a new account and then add a new contact to the account.

  1. Point your browser at the front-end web application at xxxx-ui.app.stack9.dev
  2. Click the CRM tile to open the Accounts screen.
  3. Click Create and a capture form will be displayed.
  4. Enter the following details:
    • Company Name: Test Company A
    • Account No.: 1234
    • Status: Active
  5. Click Save.
  6. Repeat the process to create as many account records as you like.

Next we will create a contact:

  1. Go to the Contacts screen you created earlier and click Create
  2. Enter the following details:
    • Account: Test Company A
    • First Name: Joe
    • Last Name: Bloggs
    • Phone: 0455 555 555
    • Email: test@example.com
  3. Note the Full Name field is empty and read-only. We'll deal with that in the next section: Automation.

8 Defining Logic using Automation

Introduction to different types of automation... 

8.1 Update a field automatically

ThisYou simplemay automationwant a separate field in your contact records that holds a Full Name value made up from the contact's First Name and their Last Name. You could get the user to enter it manually when they create or update the record but that would be inefficient. Instead we can get the system to automatically update the Full Name field.

First we will create a query that will update the contactrelevant entityrecord's full_name field calledwith a concatenated value made of first_name and last_name.

  1. In the Console, navigate to Data Hub > full_nameQuery Library and click Create New.
  2. Call it updateContactFullName
  3. Choose Stack9 Database as the connector
  4. Enter the following query:
    update contact
set full_name = first_name || ' ' || last_name
where id = {{contact_id}}
  5. Click Save.

Next we will use the query in an automation that will be run when a new contact record is created.

  1. In the Console, navigate to App Builder > Automations and click Create New.
  2. Choose When record updated as the automation type
  3. Enter the following details:
    • Name of the automation: Update Contact Full Name
    • Field ID: update_contact_full_name
    • App: CRM
    • Entity Key: Contact
  4. Click the Create button
  5. Open the automation to configure it
  6. In the Actions section click Add Action
  7. Choose EntityRun updateQuery.
  8. Enter the following details:
    • Name: Update Full Name
    • Key: update_full_name
    • EntityQuery Library Key: ContactupdateContactFullName (the query you created in the first step)
    • Entity ID: {{trigger.entity.id}} << check
    • JSON Body: {{}} << to come...tbc
  9. Click Save Changes to update the automation








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