Node.js Developer Guide
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  • Forest Admin
  • Getting started
    • How it works
    • Quick start
    • Install
      • Create your agent
      • Expose an HTTP endpoint
        • For standalone agents
        • On Express
        • On Koa
        • On Fastify
        • On NestJS
      • Autocompletion & Typings
      • Troubleshooting
    • Migrating legacy agents
      • What's new
      • Pre-requisites
      • Recommendations
      • Migration steps
        • Run new agent in parallel
        • Configure database connection
        • Code transformations
          • API Charts
          • Live Queries
          • Smart Charts
          • Route overrides
          • Smart Actions
          • Smart Fields
          • Smart Relationships
          • Smart Segments
        • Compare schemas
        • Swap agents
      • Post-migration
        • Dropping Sequelize
        • Optimize your agent
  • Data Sources
    • Getting Started
      • Collection selection
      • Naming conflicts
      • Cross-data source relationships
      • Query interface and Native Queries
        • Fields and projections
        • Filters
        • Aggregations
    • Provided data sources
      • SQL (without ORM)
      • Sequelize
      • Mongoose
      • MongoDB
    • Write your own
      • Replication strategy
        • Persistent cache
        • Updating the replica
          • Scheduled rebuilds
          • Change polling
          • Push & Webhooks
        • Schema & References
        • Write handlers
      • Translation strategy
        • Structure declaration
        • Capabilities declaration
        • Read implementation
        • Write implementation
        • Intra-data source Relationships
      • Contribute
  • Agent customization
    • Getting Started
    • Actions
      • Scope and context
      • Result builder
      • Static Forms
      • Widgets in Forms
      • Dynamic Forms
      • Form layout customization
      • Related data invalidation
    • Charts
      • Value
      • Objective
      • Percentage
      • Distribution
      • Leaderboard
      • Time-based
    • Fields
      • Add fields
      • Move, rename and remove fields
      • Override binary field mode
      • Override writing behavior
      • Override filtering behavior
      • Override sorting behavior
      • Validation
    • Hooks
      • Collection hook
      • Collection override
    • Pagination
    • Plugins
      • Provided plugins
        • AWS S3
        • Advanced Export
        • Flattener
      • Write your own
    • Relationships
      • To a single record
      • To multiple records
      • Computed foreign keys
      • Under the hood
    • Search
    • Segments
  • Frontend customization
    • Smart Charts
      • Create a table chart
      • Create a bar chart
      • Create a cohort chart
      • Create a density map
    • Smart Views
      • Create a Map view
      • Create a Calendar view
      • Create a Shipping view
      • Create a Gallery view
      • Create a custom tinder-like validation view
      • Create a custom moderation view
  • Deploying to production
    • Environments
      • Deploy on AWS
      • Deploy on Heroku
      • Deploy on GCP
      • Deploy on Ubuntu
      • Deploy on Azure
    • Development workflow
    • Using branches
    • Deploying your changes
    • Forest Admin CLI commands
      • init
      • login
      • branch
      • switch
      • set-origin
      • push
      • environments:create
      • environments:reset
      • deploy
  • Under the hood
    • .forestadmin-schema.json
    • Data Model
      • Typing
      • Relationships
    • Security & Privacy
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On this page
  • Common pitfalls
  • Getting stuck
  • Premature optimizations
  • Testing

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  1. Getting started
  2. Migrating legacy agents

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PreviousPre-requisitesNextMigration steps

Last updated 1 year ago

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This is the official documentation of the @forestadmin/agent Node.js agent.

The new agent is built with a different architecture and breaks API retro compatibility with the legacy agents.

Migrating is not a complex process, but it cannot be done incrementally. Customers have reported that they achieved this in a single working day, but it ultimately depends on the complexity of your project.

Projects which apply a few customizations to their collections will be able to migrate in a few hours, while others that heavily rely on features such as will need more time.

Common pitfalls

Getting stuck

If you get stuck during the migration, you can always contact our support team at .

Feedback about any issue you encounter during the migration process is invaluable to us, so please don't hesitate to share it.

Premature optimizations

When migrating from a previous version of the Agent, your objective is to make sure that your old agent can be substituted by the new one.

When you start coding, you will notice that the new API allows you to use more performant code and will be tempted to use it as you go.

We recommend shortening the migration process as much as possible by restraining yourself to the minimum amount of changes.

Testing

Once you have migrated your project, you will need to test it thoroughly to make sure that everything works as expected.

Smart Collections ↗
https://community.forestadmin.com/ ↗