How to drop mutations

Users Dgraph
1

Hi,
Totally straight forward question. Want to drop all the mutations present in the graph. what I found on the dgraph tour that we can drop data by id but can we drop database by its name or drop all the mutation.

Thank you

2

DELETE ALL DATA: https://docs.dgraph.io/deploy/#delete-database

3

To drop all data, you can use :

{
  "drop_all": true
}

It deletes everything from the database and starts from a clean state.

4

Hi @karan28aug
tried with this but getting an error Expected Left round brackets. Got: lex.Item [14] ":"

5

I tried this again it is working without an error.
Just try it again in Alter in Ratel and let me know if it works for you or again showing you the same error.

6

you should run this operation in alter not in query or others like mutate, schema.

curl -X POST localhost:8080/alter -d ‘{“drop_all”: true}’

7

can you tell one more thing

how can i fetch whole data with one query withput using any id

sample - In sql we use * from fetching all the data

1 Like
8 
{
  all_nodes(func: has(_predicate_)) {
    expand(_all_) {
      expand(_all_) 
    }
  }
}

Try to use this and let me know if it works for you :slight_smile:

1 Like
9

yaa ts working

Is there anything like nodetype in dgraph or if its there how will i know.

thank you

10

You can set a type to the Node when you are setting a schema for the data to be loaded.
For ex:

name: string @index(term) @lang .
age: int @index(int) .
friend: uid @count .

Here string, int, uid are type you have assigned to name, age and friend…

11

I think you miss understood something, let me clear more
actually, i played with NEO4J sometimes back, in NEO4J we have to make a nodetype first to insert data.

NEO4J query : CREATE (n:People{name:"abc", age:35})

People is a nodetype

Similarly, how can i create nodetype in dgraph :slight_smile:

12

Ref: howto


import pydgraph
import json

client_stub = pydgraph.DgraphClientStub('localhost:9080')
client = pydgraph.DgraphClient(client_stub)

# Create Schema
schema = """type: string @index(exact) .
            name: string ."""
op = pydgraph.Operation(schema=schema)
client.alter(op)

# Data
txn = client.txn()
p = {
    "type": "People",
    "name": "Alpha",
}
assigned = txn.mutate(set_obj=p)

q = {
    "type": "People",
    "name": "Beta",
}
assigned = txn.mutate(set_obj=q)
txn.commit()

# Fetch type people
# Fetch Data
query = """query all($a: string) {
    all(func: eq(type, $a)) {
        expand(_all_) {}
    }
}"""
variables = {'$a': 'People'}


# Print
res = client.query(query, variables=variables)
ppls = json.loads(res.json.decode('utf-8'))

for ppl in ppls["all"]:
    print(ppl)

I think its a hack to get node type, but it seems to wrok

2 Likes
13

:+1: great
can we explicitly declare nodetype.
something like this

1 Like
14

I have a similar post here Have many `schema`s

1 Like
15 
type School struct {
    Name string `json:"name,omitempty"`
}

type Person struct {
    Uid     string   `json:"uid,omitempty"`
    Name    string   `json:"name,omitempty"`
    Age     int      `json:"age,omitempty"`
    Married bool     `json:"married,omitempty"`
    Raw     []byte   `json:"raw_bytes,omitempty"`
    Friends []Person `json:"friend,omitempty"`
    School  []School `json:"school,omitempty"`
}

You can do something like this.

1 Like
17

https://docs.dgraph.io/mutations/#json-mutation-format

18

Hi @karan28aug
like below format, I am creating a schema in python. Can you tell me how may I use above schema in python.

    name: string @index(exact) .
    friend: uid @reverse .
    age: int .
    married: bool .
    loc: geo .
    dob: datetime .
19