For the following schema
type Country {
# **Don't delete** Comments in types should work
id: ID! # **Don't delete** Comments in in lines should work
name: String! @search(by: [trigram, hash])
states: [State] @hasInverse(field: country)
}
type State {
id: ID!
xcode: String! @id @search(by: [regexp])
name: String!
capital: String
region: Region
country: Country
}
type Region {
id: String! @id
name: String!
district: District
}
type District {
id: String! @id
name: String!
}
running this mutation on an empty instance
mutation {
addCountry(input: [{
name: "c1",
states: [{
xcode: "s1",
name: "s1",
region: {
id: "r1",
name: "r1",
district: {
id: "d1",
name: "d1"
}
}
}]
}]) {
country {
id
name
states {
xcode
name
region {
id
name
district {
id
name
}
}
}
}
}
}
fails with the below error
{
"errors": [
{
"message": "mutation addCountry failed because Dgraph execution failed because Some variables are declared multiple times.",
"locations": [
{
"line": 2,
"column": 3
}
]
}
],
"data": {
"addCountry": null
}
}
This happens because the rewritten query has a variable defined twice. On debugging I found that Region6 is defined twice. See the generated query below.
query {
State3 as State3(func: eq(State.xcode, "s1")) @filter(type(State)) {
uid
}
Region6 as Region6(func: eq(Region.id, "r1")) @filter(type(Region)) {
uid
}
Region6 as Region6(func: eq(Region.id, "r1")) @filter(type(Region)) {
uid
}
District8 as District8(func: eq(District.id, "d1")) @filter(type(District)) {
uid
}
}