How to update a predicate and node using go client

Users Dgraph
5

Hi @teja,

This can be achieved using upserts. Consider the following example.

{
  set {
    _:a <name> "alice" .
    _:a <country> "japan" .
  }
}

suppose you want to change the country of Alice, you can do this by:

upsert{
  query {
    q(func: eq(name, "alice")) {
      v as uid
      name
    }
  }

  mutation {
    set {
      uid(v) <country> "India" .
    }
  }
}

I want to change the predicate name to differentiate the type data then how can I acheive that ??

Now if you want to change the name of predicate itself, for example changing the name of predicate “name” to “first_name” by:

upsert{
  query {
    q(func: has(name)) {
      v as uid
      n as name
    }
  }

  mutation {
    set {
      uid(v) <first_name> val(n) .
    }
    
    delete{
      uid(v) <name> * .
    }
  }
}

I want to update a node with a new field or to remove an existing field how can I achieve that

Quite similar, the below example adds new predicate age, in the node with name equal to alice.

upsert{
  query {
    q(func: eq(name, "alice")) {
      v as uid
      name
    }
  }

  mutation {
    set {
      uid(v) <age> "21" .
    }
  }
}
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