I have the following domain model:
Author - creates posts and can reply to comments
Guest/Reader - can leave comments
I want to find authors that didn't reply to comments of a specific user.
I tried the following query, but it doesn't work.
MATCH (author:Author),(reader) WHERE NOT (author:Account)-[:REPLIED_TO_COMMENT]-[:LEFT_COMMENT]-(reader) RETURN DISTINCT author
Please help to create a valid query.
If I got your question correctly the query should be defined as follows:
MATCH (author:Author),(reader:Reader {email:'specific@user.email'})
WHERE NOT (author)-[:REPLIED_TO_COMMENT]->(:ReaderComment)<-[:LEFT_COMMENT]-(reader)
RETURN DISTINCT author
Explanation of the query:
MATCH (author:Author),(reader:Reader {email:'specific@user.email'})
- as you stated you need to query a specifc reader, therefore we are filtering readers by email (just for example), also we are defining author and reader
"variables" to use later. WHERE NOT (author)-[:REPLIED_TO_COMMENT]->(:ReaderComment)<-[:LEFT_COMMENT]-(reader) AND
- you've missed the comment Node Type. We can read this as follows Where an author didn't reply to any comments left by a specific readerI hope this will match your requirements.
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