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# PocketBase Complete JSVM Reference
Comprehensive PocketBase JavaScript Virtual Machine (JSVM) documentation with ALL available hooks, functions, APIs, and features. This reference is based on official PocketBase documentation and provides complete coverage of server-side JavaScript capabilities.
**Source**: Official PocketBase Documentation (https://pocketbase.io/docs/)
**Last Updated**: Based on current PocketBase documentation
**Version Compatibility**: Always verify hook availability with your PocketBase version
---
## Table of Contents
1. [JSVM Overview](#jsvm-overview)
2. [App Hooks](#app-hooks)
3. [Record Model Hooks](#record-model-hooks)
4. [Collection Model Hooks](#collection-model-hooks)
5. [Request Hooks](#request-hooks)
6. [Authentication Hooks](#authentication-hooks)
7. [Mailer Hooks](#mailer-hooks)
8. [Realtime Hooks](#realtime-hooks)
9. [Custom Routing](#custom-routing)
10. [Database Operations](#database-operations)
11. [Available APIs](#available-apis)
12. [Utility Functions](#utility-functions)
13. [Error Handling](#error-handling)
14. [Best Practices](#best-practices)
---
## JSVM Overview
PocketBase includes a JavaScript Virtual Machine that allows you to extend backend functionality with custom server-side JavaScript. All hooks follow the pattern `function(e) {}` and require calling `e.next()` to continue execution.
### Hook Files Structure
```
pb_hooks/
├── main.pb.js # Main hooks file
├── auth.pb.js # Authentication hooks
├── email.pb.js # Email customization
├── collections.pb.js # Collection hooks
├── routes.pb.js # Custom API routes
└── utils.pb.js # Utility functions
```
---
## App Hooks
Application lifecycle and system-level hooks.
### onBootstrap
Initialize application resources when PocketBase starts.
```javascript
onBootstrap((e) => {
console.log("PocketBase is starting up");
// Initialize global variables, connections, etc.
e.next();
});
```
### onSettingsReload
Triggered when application settings are updated.
```javascript
onSettingsReload((e) => {
console.log("Settings have been reloaded");
// React to setting changes
e.next();
});
```
### onBackupCreate
Called during backup creation process.
```javascript
onBackupCreate((e) => {
console.log("Creating backup");
// Add custom backup logic
e.next();
});
```
### onBackupRestore
Called during backup restoration process.
```javascript
onBackupRestore((e) => {
console.log("Restoring from backup");
// Add custom restoration logic
e.next();
});
```
### onTerminate
Triggered when application is shutting down.
```javascript
onTerminate((e) => {
console.log("PocketBase is shutting down");
// Cleanup resources, close connections
e.next();
});
```
---
## Record Model Hooks
Hooks for record operations (create, update, delete, validate).
### Record Creation Hooks
#### onRecordCreate
Called before record creation, allows modification of record data.
```javascript
onRecordCreate((e) => {
console.log(`Creating record in ${e.collection.name}`);
// Modify record before creation
if (e.collection.name === "users") {
e.record.set("created_ip", e.request?.remoteAddr || "unknown");
e.record.set("status", "active");
}
e.next();
}, "users"); // Optional collection scope
```
#### onRecordCreateExecute
Called during the actual record creation execution.
```javascript
onRecordCreateExecute((e) => {
console.log("Record creation executing");
e.next();
});
```
#### onRecordAfterCreateSuccess
Called after successful record creation.
```javascript
onRecordAfterCreateSuccess((e) => {
console.log(`Record created successfully: ${e.record.id}`);
// Post-creation actions
if (e.collection.name === "orders") {
// Update inventory, send notifications, etc.
updateInventory(e.record);
sendOrderConfirmation(e.record);
}
e.next();
}, "orders");
```
#### onRecordAfterCreateError
Called when record creation fails.
```javascript
onRecordAfterCreateError((e) => {
console.log("Record creation failed:", e.error);
// Log error, send alerts, etc.
e.next();
});
```
### Record Update Hooks
#### onRecordUpdate
Called before record update, allows modification of record data.
```javascript
onRecordUpdate((e) => {
console.log(`Updating record in ${e.collection.name}`);
// Add update metadata
e.record.set("updated_at", new Date().toISOString());
e.record.set("updated_by", e.request?.auth?.id || null);
e.next();
});
```
#### onRecordUpdateExecute
Called during the actual record update execution.
```javascript
onRecordUpdateExecute((e) => {
console.log("Record update executing");
e.next();
});
```
#### onRecordAfterUpdateSuccess
Called after successful record update.
```javascript
onRecordAfterUpdateSuccess((e) => {
console.log(`Record updated successfully: ${e.record.id}`);
// Post-update actions
if (e.collection.name === "products") {
// Clear cache, update search index, etc.
clearProductCache(e.record.id);
}
e.next();
});
```
#### onRecordAfterUpdateError
Called when record update fails.
```javascript
onRecordAfterUpdateError((e) => {
console.log("Record update failed:", e.error);
e.next();
});
```
### Record Deletion Hooks
#### onRecordDelete
Called before record deletion.
```javascript
onRecordDelete((e) => {
console.log(`Deleting record from ${e.collection.name}`);
// Pre-deletion checks
if (e.collection.name === "users") {
// Archive user data before deletion
archiveUserData(e.record);
}
e.next();
});
```
#### onRecordDeleteExecute
Called during the actual record deletion execution.
```javascript
onRecordDeleteExecute((e) => {
console.log("Record deletion executing");
e.next();
});
```
#### onRecordAfterDeleteSuccess
Called after successful record deletion.
```javascript
onRecordAfterDeleteSuccess((e) => {
console.log(`Record deleted successfully: ${e.record.id}`);
// Post-deletion cleanup
cleanupRelatedData(e.record.id);
e.next();
});
```
#### onRecordAfterDeleteError
Called when record deletion fails.
```javascript
onRecordAfterDeleteError((e) => {
console.log("Record deletion failed:", e.error);
e.next();
});
```
### Record Validation and Enrichment
#### onRecordValidate
Custom validation logic for records.
```javascript
onRecordValidate((e) => {
if (e.collection.name === "users") {
// Custom validation
if (!e.record.get("email")) {
throw new BadRequestError("Email is required");
}
if (e.record.get("age") < 18) {
throw new BadRequestError("Must be 18 or older");
}
}
e.next();
});
```
#### onRecordEnrich
Add computed fields or modify record data before returning to client.
```javascript
onRecordEnrich((e) => {
if (e.collection.name === "users") {
// Add computed fields
const firstName = e.record.get("first_name") || "";
const lastName = e.record.get("last_name") || "";
e.record.set("full_name", `${firstName} ${lastName}`.trim());
// Add calculated fields
const createdDate = new Date(e.record.created);
const now = new Date();
const daysSinceCreated = Math.floor((now - createdDate) / (1000 * 60 * 60 * 24));
e.record.set("days_since_created", daysSinceCreated);
}
e.next();
});
```
---
## Collection Model Hooks
Hooks for collection-level operations.
### onCollectionValidate
Validate collection schema changes.
```javascript
onCollectionValidate((e) => {
console.log(`Validating collection: ${e.collection.name}`);
// Custom collection validation logic
if (e.collection.name === "critical_data") {
// Ensure critical collections have specific fields
const requiredFields = ["created", "updated", "owner"];
// Validation logic here
}
e.next();
});
```
### onCollectionCreate
Called when a new collection is created.
```javascript
onCollectionCreate((e) => {
console.log(`Collection created: ${e.collection.name}`);
// Auto-setup for new collections
if (e.collection.type === "base") {
// Add default fields, rules, etc.
}
e.next();
});
```
### onCollectionUpdate
Called when a collection is updated.
```javascript
onCollectionUpdate((e) => {
console.log(`Collection updated: ${e.collection.name}`);
// Handle schema changes
migrateExistingData(e.collection);
e.next();
});
```
### onCollectionDelete
Called when a collection is deleted.
```javascript
onCollectionDelete((e) => {
console.log(`Collection deleted: ${e.collection.name}`);
// Cleanup related data
cleanupCollectionReferences(e.collection.name);
e.next();
});
```
---
## Request Hooks
HTTP request-level hooks for API operations.
### Record CRUD Request Hooks
#### onRecordsListRequest
Called when listing records via API.
```javascript
onRecordsListRequest((e) => {
console.log(`Records list requested for: ${e.collection.name}`);
// Add custom filtering, logging, etc.
logApiAccess(e.request, "list", e.collection.name);
e.next();
});
```
#### onRecordViewRequest
Called when viewing a single record via API.
```javascript
onRecordViewRequest((e) => {
console.log(`Record view requested: ${e.record.id}`);
// Track record views
incrementViewCount(e.record.id);
e.next();
});
```
#### onRecordCreateRequest
Called when creating a record via API.
```javascript
onRecordCreateRequest((e) => {
console.log(`Record create request for: ${e.collection.name}`);
// Pre-creation API validation
validateApiRequest(e.request);
e.next();
});
```
#### onRecordUpdateRequest
Called when updating a record via API.
```javascript
onRecordUpdateRequest((e) => {
console.log(`Record update request: ${e.record.id}`);
// API-level update validation
validateUpdatePermissions(e.request, e.record);
e.next();
});
```
#### onRecordDeleteRequest
Called when deleting a record via API.
```javascript
onRecordDeleteRequest((e) => {
console.log(`Record delete request: ${e.record.id}`);
// API-level deletion checks
validateDeletePermissions(e.request, e.record);
e.next();
});
```
### Other Request Hooks
#### onBatchRequest
Called for batch API operations.
```javascript
onBatchRequest((e) => {
console.log("Batch request received");
// Handle batch operations
validateBatchSize(e.request);
e.next();
});
```
#### onFileDownloadRequest
Called when files are downloaded.
```javascript
onFileDownloadRequest((e) => {
console.log(`File download requested: ${e.record.id}`);
// Track downloads, validate access
logFileAccess(e.record, e.request);
e.next();
});
```
#### onFileTokenRequest
Called when file access tokens are requested.
```javascript
onFileTokenRequest((e) => {
console.log("File token requested");
// Custom file access logic
validateFileAccess(e.request);
e.next();
});
```
---
## Authentication Hooks
Hooks for authentication and authorization operations.
### General Authentication
#### onRecordAuthRequest
General authentication request hook.
```javascript
onRecordAuthRequest((e) => {
console.log("Authentication request received");
// General auth logging and validation
logAuthAttempt(e.request);
e.next();
});
```
#### onRecordAuthRefreshRequest
Called when auth tokens are refreshed.
```javascript
onRecordAuthRefreshRequest((e) => {
console.log("Auth token refresh requested");
// Track token refreshes
logTokenRefresh(e.request);
e.next();
});
```
### Password Authentication
#### onRecordAuthWithPasswordRequest
Called for password-based authentication.
```javascript
onRecordAuthWithPasswordRequest((e) => {
const email = e.record?.get("email") || "unknown";
const clientIP = e.request?.remoteAddr || "unknown";
console.log(`Password auth attempt: ${email} from ${clientIP}`);
// Rate limiting logic
checkRateLimit(email, clientIP);
// Security logging
logPasswordAttempt(email, clientIP);
e.next();
}, "users");
```
### OAuth2 Authentication
#### onRecordAuthWithOAuth2Request
Called for OAuth2 authentication.
```javascript
onRecordAuthWithOAuth2Request((e) => {
console.log(`OAuth2 auth with provider: ${e.providerName}`);
// Custom OAuth2 handling
handleOAuth2Provider(e.providerName, e.record);
e.next();
});
```
### OTP Authentication
#### onRecordAuthWithOTPRequest
Called for OTP (One-Time Password) authentication.
```javascript
onRecordAuthWithOTPRequest((e) => {
console.log("OTP authentication requested");
// Custom OTP validation
validateOTPAttempt(e.record, e.request);
e.next();
});
```
#### onRecordRequestOTPRequest
Called when OTP is requested.
```javascript
onRecordRequestOTPRequest((e) => {
console.log("OTP generation requested");
// Custom OTP generation logic
generateCustomOTP(e.record);
e.next();
});
```
### Password Reset
#### onRecordRequestPasswordResetRequest
Called when password reset is requested.
```javascript
onRecordRequestPasswordResetRequest((e) => {
console.log("Password reset requested");
// Security checks for password reset
validatePasswordResetRequest(e.record, e.request);
e.next();
});
```
#### onRecordConfirmPasswordResetRequest
Called when password reset is confirmed.
```javascript
onRecordConfirmPasswordResetRequest((e) => {
console.log("Password reset confirmed");
// Post-reset actions
logPasswordReset(e.record);
invalidateAllSessions(e.record);
e.next();
});
```
### Email Verification
#### onRecordRequestVerificationRequest
Called when email verification is requested.
```javascript
onRecordRequestVerificationRequest((e) => {
console.log("Email verification requested");
// Custom verification logic
generateVerificationToken(e.record);
e.next();
});
```
#### onRecordConfirmVerificationRequest
Called when email verification is confirmed.
```javascript
onRecordConfirmVerificationRequest((e) => {
console.log("Email verification confirmed");
// Post-verification actions
activateUserAccount(e.record);
sendWelcomeEmail(e.record);
e.next();
});
```
### Email Change
#### onRecordRequestEmailChangeRequest
Called when email change is requested.
```javascript
onRecordRequestEmailChangeRequest((e) => {
console.log("Email change requested");
// Validate email change request
validateEmailChangeRequest(e.record, e.request);
e.next();
});
```
#### onRecordConfirmEmailChangeRequest
Called when email change is confirmed.
```javascript
onRecordConfirmEmailChangeRequest((e) => {
console.log("Email change confirmed");
// Post-email-change actions
logEmailChange(e.record);
updateRelatedRecords(e.record);
e.next();
});
```
---
## Mailer Hooks
Hooks for email customization and handling.
### onMailerSend
General email sending hook - intercepts all outgoing emails.
```javascript
onMailerSend((e) => {
console.log(`Sending email to: ${e.message.to.join(", ")}`);
console.log(`Subject: ${e.message.subject}`);
// Customize email content
e.message.subject = `[GRP] ${e.message.subject}`;
// Add custom headers
e.message.headers = e.message.headers || {};
e.message.headers["X-Company"] = "Grand Rapids Print";
// Log email sending
logEmailSent(e.message);
e.next();
});
```
### Specific Email Type Hooks
#### onMailerRecordAuthAlertSend
Customize authentication alert emails.
```javascript
onMailerRecordAuthAlertSend((e) => {
console.log("Sending auth alert email");
// Customize auth alert content
e.message.subject = "Security Alert - New Login Detected";
e.message.html = customAuthAlertTemplate(e.record, e.meta);
e.next();
});
```
#### onMailerRecordPasswordResetSend
Customize password reset emails.
```javascript
onMailerRecordPasswordResetSend((e) => {
console.log("Sending password reset email");
// Brand the password reset email
e.message.subject = "Reset Your GRP Account Password";
e.message.html = `
<div style="font-family: Arial, sans-serif;">
<h2>Password Reset Request</h2>
<p>Hello ${e.record.get("name") || e.record.get("email")},</p>
<p>You requested a password reset for your Grand Rapids Print account.</p>
<p><a href="${e.meta.actionUrl}" style="background: #007bff; color: white; padding: 10px 20px; text-decoration: none; border-radius: 5px;">Reset Password</a></p>
<p>If you didn't request this, please ignore this email.</p>
<p>Best regards,<br>Grand Rapids Print Team</p>
</div>
`;
e.next();
});
```
#### onMailerRecordVerificationSend
Customize email verification emails.
```javascript
onMailerRecordVerificationSend((e) => {
console.log("Sending verification email");
e.message.subject = "Verify Your GRP Account Email";
e.message.html = customVerificationTemplate(e.record, e.meta.actionUrl);
e.next();
});
```
#### onMailerRecordEmailChangeSend
Customize email change confirmation emails.
```javascript
onMailerRecordEmailChangeSend((e) => {
console.log("Sending email change confirmation");
e.message.subject = "Confirm Your New Email Address";
e.message.html = customEmailChangeTemplate(e.record, e.meta);
e.next();
});
```
#### onMailerRecordOTPSend
Customize OTP emails.
```javascript
onMailerRecordOTPSend((e) => {
console.log("Sending OTP email");
e.message.subject = "Your GRP Verification Code";
e.message.html = customOTPTemplate(e.record, e.meta.otp);
e.next();
});
```
---
## Realtime Hooks
Hooks for realtime/WebSocket functionality.
#### onRealtimeConnectRequest
Called when clients connect to realtime.
```javascript
onRealtimeConnectRequest((e) => {
console.log("Realtime connection requested");
// Validate realtime connection
validateRealtimeAccess(e.request);
// Log connection
logRealtimeConnection(e.request);
e.next();
});
```
#### onRealtimeSubscribeRequest
Called when clients subscribe to realtime channels.
```javascript
onRealtimeSubscribeRequest((e) => {
console.log(`Realtime subscription to: ${e.subscription}`);
// Custom subscription validation
validateSubscription(e.subscription, e.request);
e.next();
});
```
#### onRealtimeMessageSend
Called when realtime messages are sent.
```javascript
onRealtimeMessageSend((e) => {
console.log("Realtime message sending");
// Filter or modify realtime messages
filterRealtimeMessage(e.message);
e.next();
});
```
---
## Custom Routing
Create custom API endpoints using the routing system.
### Basic Route Registration
#### GET Routes
```javascript
// Simple GET route
routerAdd("GET", "/api/hello", (c) => {
return c.json(200, {
message: "Hello from PocketBase!",
timestamp: new Date().toISOString()
});
});
// GET with path parameters
routerAdd("GET", "/api/hello/{name}", (c) => {
const name = c.request.pathValue("name");
return c.json(200, {
message: `Hello, ${name}!`
});
});
// GET with query parameters
routerAdd("GET", "/api/search", (c) => {
const query = c.request.url.query().get("q");
const limit = c.request.url.query().get("limit") || "10";
return c.json(200, {
query: query,
limit: parseInt(limit),
results: []
});
});
```
#### POST Routes
```javascript
// POST with JSON data
routerAdd("POST", "/api/contact", (c) => {
const data = $apis.requestInfo(c).data;
// Validate required fields
if (!data.email || !data.message) {
return c.json(400, {
error: "Email and message are required"
});
}
// Process contact form
console.log(`Contact from: ${data.email}`);
// Save to database
const collection = $app.dao().findCollectionByNameOrId("contacts");
const record = new Record(collection);
record.set("email", data.email);
record.set("message", data.message);
record.set("created", new Date().toISOString());
$app.dao().saveRecord(record);
return c.json(200, {
success: true,
message: "Contact form submitted successfully"
});
});
```
### Protected Routes
#### Authentication Required
```javascript
// Route requiring authentication
routerAdd("GET", "/api/profile", (c) => {
const info = $apis.requestInfo(c);
if (!info.authRecord) {
return c.json(401, {
error: "Authentication required"
});
}
return c.json(200, {
user: {
id: info.authRecord.id,
email: info.authRecord.get("email"),
name: info.authRecord.get("name"),
created: info.authRecord.created
}
});
}, $apis.requireRecordAuth());
// Superuser only route
routerAdd("GET", "/api/admin/stats", (c) => {
// Get system statistics
const userCount = $app.dao().totalRecords("users");
const orderCount = $app.dao().totalRecords("orders");
return c.json(200, {
users: userCount,
orders: orderCount,
server_time: new Date().toISOString()
});
}, $apis.requireSuperuserAuth());
```
### File Handling Routes
#### File Upload
```javascript
routerAdd("POST", "/api/upload", (c) => {
const data = $apis.requestInfo(c).data;
const file = data.file;
if (!file) {
return c.json(400, { error: "No file provided" });
}
// Validate file type
const allowedTypes = ["image/jpeg", "image/png", "image/webp"];
if (!allowedTypes.includes(file.type)) {
return c.json(400, { error: "Invalid file type" });
}
// Process file upload
console.log(`File uploaded: ${file.name}, Size: ${file.size} bytes`);
// Save file metadata to database
const collection = $app.dao().findCollectionByNameOrId("files");
const record = new Record(collection);
record.set("filename", file.name);
record.set("size", file.size);
record.set("type", file.type);
record.set("uploaded_at", new Date().toISOString());
$app.dao().saveRecord(record);
return c.json(200, {
success: true,
filename: file.name,
size: file.size,
id: record.id
});
});
```
#### File Download
```javascript
routerAdd("GET", "/api/download/{fileId}", (c) => {
const fileId = c.request.pathValue("fileId");
try {
const record = $app.dao().findRecordById("files", fileId);
// Check permissions
const info = $apis.requestInfo(c);
if (!canAccessFile(info.authRecord, record)) {
return c.json(403, { error: "Access denied" });
}
// Serve the file
return c.fileFS(record.get("file"), "uploads");
} catch (error) {
return c.json(404, { error: "File not found" });
}
});
```
### Middleware Usage
#### Global Middleware
```javascript
// Add CORS middleware globally
routerUse((next) => {
return (c) => {
c.response.header().set("Access-Control-Allow-Origin", "*");
c.response.header().set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
c.response.header().set("Access-Control-Allow-Headers", "Content-Type, Authorization");