How to grant Userpoints after adding a comment once? I created a Rule that grants Userpoints to users when they comment on a node. However, I would like to grant these points only once per node per user. That means future comments from the same user on that node should not result in extra points.

How can I do that?
I solved my problem with the Flags module: I created the flags called 'Commented on this node' &amp; 'First reaction'* and rule called 'Commented on a node'. These are my rule's settings:

EVENTS: After saving a new comment

CONDITIONS:


Content is of type Parameter: Content: [comment:node], Content types:
Article
NOT Node is flagged Parameter: Flag: Commented on this node, node:
[comment:node], User on whose behalf to check: [comment:author]


ACTIONS:


Grant points to a user Parameter: User: [comment:author],
Points: 2, Points category: Reaction, Entity: [comment:node],
Description: New reaction, Operation: Add,
Display: false, Moderate: Automatically approved
Flag a Node Parameter: Flag: Commented on a node, Node:
[comment:node], User on whose behalf to flag: [comment:author], Skip
permission check: false
Flag a Comment: Parameter: Flag: First reaction, Comment: [comment],
User on whose behalf to flag: [comment:author], Skip permission
check: false


So, every time a user adds a comment to a certain node for the first time, the node is flagged as 'Commented on a node', the reaction is flagged as 'First reaction' and the user who added the comment is rewarded 2 points.

**I use the 'First comment' flag in a related question.*