updating while im creating node

[hoseinmorshedy]

hi

im trying to create node with label words in my database that already exist and wanna add new property(i use constraint method to have unique words name)

my query is :

merge (n:words{name:"'" , instance:"apostrophe"}) with (n) match (a:PartOfSpeech{abbr:'sym'}) merge (n)-[:IS{type:'pos'}]->(a)

 so i get an error i could fix it with 

merge (n:words{name:'‘'})
on match set n.instance = "apostrophe"
with (n) match (a:PartOfSpeech{abbr:'sym'}) merge (n)-[:IS{type:'pos'}]->(a)

but cause im sending query from js i wan to this be automatic is there any way

[michael_hunger]

You should probably rethink your model a bit, it might be too generic. You can pull the instance:apostrophe into a node-label, also 'abbr:sym' and type:pos into a relationship-type, instead of using the generic :IS 

But yes if you want to update and you don't know if it exists a MERGE with an ON MATCH SET makes sense if you always want to set the instance then you can just use SET