84771f5864
Fixes #2513 If a node inside a subflow accessed its context object in its constructor, the subflow-instance flow context would not yet have been created. This would cause a place holder context to get created on its behalf, but that place holder doesn't have its parent set properly. This then breaks the usage of $parent inside such a subflow. This fix has changed it so flows (and subflows) create their flow context as part of their initial creation. That ensures it exists when individual nodes from the subflow are created, allowing them to safely access their context. This has also fixed a related issue where any attempt to use $parent to access beyond the root parent would seemingly hang as the callback was never being called. This would cause messages to get stuck in flows. The fix ensures the callback is used in the root context objects and undefined is returned.
Node-RED
Low-code programming for event-driven applications.
Quick Start
Check out http://nodered.org/docs/getting-started/ for full instructions on getting started.
sudo npm install -g --unsafe-perm node-rednode-red- Open http://localhost:1880
Getting Help
More documentation can be found here.
For further help, or general discussion, please use the Node-RED Forum or slack team.
Developers
If you want to run the latest code from git, here's how to get started:
-
Clone the code:
git clone https://github.com/node-red/node-red.git cd node-red -
Install the node-red dependencies
npm install -
Build the code
npm run build -
Run
npm start
Contributing
Before raising a pull-request, please read our contributing guide.
This project adheres to the Contributor Covenant 1.4. By participating, you are expected to uphold this code. Please report unacceptable behavior to any of the project's core team at team@nodered.org.
Authors
Node-RED is a project of the OpenJS Foundation.
It was created by IBM Emerging Technology.
- Nick O'Leary @knolleary
- Dave Conway-Jones @ceejay
Copyright and license
Copyright JS Foundation and other contributors, https://openjsf.org under the Apache 2.0 license.