I am trying to get a simple list of who in chatter commented on which authors post and I am struggling to get a correct SOQL. I want something like this

Bob -> Dave
Dave -> Martha
Bruce -> Martha


meaning that Bruce commented a post by Martha.

I expected this SOQL to do the job but miserably failed ;)

select CreatedBy.Name, FeedItem.CreatedBy.Name from FeedComment

I know that it works the other way around using

SELECT CreatedBy.Name, LikeCount, (SELECT CreatedBy.Name FROM FeedComments) 
FROM FeedItem

but I am having a hard time translating that into a flat csv-like format.


Have you tried a little post processing? Haven't tried this, but should work with small fixes.

FeedItem[] items = [SELECT CreatedBy.Name, LikeCount, (SELECT CreatedBy.Name FROM FeedComments) 
FROM FeedItem

// Map to store values
Map<String, List<String>> commentersMap = new Map<String, List<String>>();

// map the keys to a empty list to avoid nulls later
for (FeedItem item:items) {
    commentersMap.put(item.CreatedBy.Name, new List<String>());

for (FeedItem item:items) {
    for (FeedComment comment : item.FeedComments) {

Then you can use the map to retrieve what you wan't:

for (String author: commentersMap.keySet()) {
    for (String commenter : commentersMap.get(author)) {
        System.debug(commenter + ' -> ' + author);
  • 1
    From what I have seen and tried, this is really the only way to do it. There is no flat, single SOQL statement you can run to get this information currently. – Jesse Altman Mar 18 '13 at 18:22

You can get the author's ID (with checksum on the end) through SOQL with the query

SELECT CreatedById FROM FeedComment

You can then use this as a sub-query to get user information:

SELECT Name FROM User WHERE ID in (SELECT CreatedById FROM FeedComment)

In practice, I find that removing the last character of the CreatedById is necessary to get a working URL to the author's Chatter profile.


There doesn't seem to be a link to travel up the relationship tree so I think you'll need to execute two queries and merge the results in code.

  • I am not sure if I understand how this would answer my question. I want all information with a single (non-aggregation) query. BTW: you could do your query in ONE statement "SELECT CreatedBy.Name FROM FeedComment". – Robert Sösemann Mar 18 '13 at 13:47
  • Ah, I misunderstood. The column FeedComment.FeedItemId points to the original post; I'm having trouble traversing the relationship in Workbench (if there is one). – Mike Chale Mar 18 '13 at 13:58
  • That is exactely the problem I am trying to solve with this question ;) – Robert Sösemann Mar 18 '13 at 14:02
  • @RobertS Have you tried using the Query Builder in Ajax Tools?? Its helped me create some really challenging and obscure queries at times. Would seem to be worth a try. – crmprogdev Mar 18 '13 at 16:42

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