const datalog = require('@datalogui/datalog')
const People = datalog.newTable({
id: datalog.NumberType,
name: datalog.StringType,
})
// Add some data
People.assert({id: 0, name: "Alice"})
People.assert({id: 1, name: "Charles"})
People.assert({id: 2, name: "Helen"})
// Define a new table for the ParentOf Relation
const ParentOf = datalog.newTable({
parentID: datalog.NumberType,
childID: datalog.NumberType,
})
ParentOf.assert({parentID: 1, childID: 0})
ParentOf.assert({parentID: 2, childID: 0})
const Query = datalog.query(({parentName, parentID, childID}) => {
People({name: "Alice", id: childID})
ParentOf({childID, parentID})
People({id: parentID, name: parentName})
})
Query.view().readAllData()
Now what if we wanted to query that data?
// Give me the ID of anyone named "Helen" from the query above.
const QueryQuery = datalog.query(({parentID}) => {
Query({parentID, parentName: "Helen"})
})
QueryQuery.view().readAllData()
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