You’ve learned how to read and display data (the “R” in C.R.U.D.). Now it’s time to master the other three essential operations: Create, Update, and Delete. In this tutorial, we will build a complete management system for our blog posts, allowing us to add new posts, edit existing ones, and remove them.

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Prerequisites

This tutorial builds directly on the previous two. You must have already completed:
  1. “Displaying a Dynamic List of Data”: You need a page showing a list of all your posts.
  2. “Displaying Single Record Details”: You need a post-detail page that can load a single post based on a URL parameter.

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Part 1: CREATE - Building a “New Post” Form

First, let’s create a way to add new posts to our database.

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Create the Zod Schema

Before we build the forms, let’s create a single “rulebook” for our post data. This ensures that new posts and edited posts follow the same validation rules.
  • Go to Data → Zod Schemas.
  • Create a new schema named PostSchema.
  • Add the following two fields:
Field NameData TypeKey Validation Rules
titleTextRequired, Minimum length: 5
contentTextRequired, Minimum length: 20
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1. Create the 'New Post' Page and Form

  • Create a new page named new-post.
  • Add a Form element to the canvas.
  • Inside the form:
    • Add an Input element. In its properties, set its Name to title.
    • Add another Input (or a Text Area) and set its Name to content.
    • Add a Submit Button labeled “Create Post”.
  • Crucially, select the main Form element and in its Properties Panel, link its Schema to your PostSchema. This automatically enables validation.
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2. Build the 'On Submit' Workflow

  • Select the Form element and open its “On Submit” workflow from the Logic tab. - Add the “Create new data” action.
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3. Configure the Action

  • Target Table: Select your Posts Data Table.
  • Fields to Create: We need to map our form inputs to the database columns.
    • For the title field, bind its value to the Data submitted from form’s title property.
    • For the content field, bind its value to the Data submitted from form’s content property.
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4. Navigate After Creation

  • After the “Create new data” action, add a “Go to page…” action.
  • Set the destination to your main blog list page. This way, the user sees their newly created post in the list immediately after creating it.

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Part 2: UPDATE - Building an “Edit Post” Form

Next, let’s allow users to edit a post on the post-detail page.
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1. Add the Editing Form to the Detail Page

  • Go to your post-detail page.
  • Add a Form element. Link its Schema to your PostSchema.
  • Inside the form, add two Input elements.
    • Set the first input’s Name to title.
    • Set the second input’s Name to content.
  • Pre-fill the form: Bind the default value of each input to the currentPost state.
    • Bind the title input’s value to currentPost.title.
    • Bind the content input’s value to currentPost.content.
  • Add a Submit Button inside the form labeled “Save Changes”.
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2. Build the 'Save Changes' Workflow

  • Select the “Save Changes” button and open its “On Click” workflow.
  • Add the “Update existing data” action.
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3. Configure the Update Action

  • Target Table: Select your Posts Data Table.
  • Conditions (WHERE Clause): Tell Saasio which post to update. Add a condition where _id is equal to the currentPost._id.
  • Fields to Update: Map the database columns to the current values from the form.
    • Set the title field to the Data submitted from form’s title property.
    • Set the content field to the Data submitted from form’s content property.
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4. Provide User Feedback

  • After the update action, add a “Show toast message” action with a Success type and a message like “Post updated successfully!”.

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Part 3: DELETE - Adding a “Delete Post” Button

Finally, let’s add the ability to remove a post.
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1. Add a Delete Button

  • On your post-detail page, add a new Button labeled “Delete Post”. It’s good practice to style it differently (e.g., with a red color) to indicate a destructive action.
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2. Build the 'Delete' Workflow

  • Select the “Delete Post” button and open its “On Click” workflow. - Add the “Delete data” action.
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3. Configure the Delete Action

  • Target Table: Select your Posts Data Table. - Conditions (WHERE Clause): This is the most important step. You must specify which post to delete. Add a condition where _id is equal to the _id of the currentPost state variable.
Never leave the conditions empty on a Delete action, as this would delete all posts in your table.
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4. Navigate After Deletion

  • After a post is deleted, the detail page is no longer valid. You must redirect the user.
  • Add a “Go to page…” action and send the user back to your main blog list page.
Congratulations! You have now implemented the full suite of CRUD operations. Your users can create, read, update, and delete data, forming the core of a fully functional web application.