querycraft-pipelines
v0.0.9
Published
Data query abstraction layer
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QueryCraft-Pipelines
Database agnostic formulation for data pipelines
Installation
npm install --save 'querycraft-pipelines'
Examples
Suppose we have a collection of data that satisfies the interface
interface contact {
id: string
'list': { id: string }[]
firstName: string
lastName: string
email: string
createdAt: Date
customFields: { id: string, value: number }[]
assignedTo?: string
}
If we want an aggregations the describes the logic:-
where
fistName is bob
lastName is doyle OR is not set
assignedTo is anything
list has an item where id is item1
Group by
the value property of the customField where id is custom1
We can build build it as easily as:-
import { FilterBuilder, eq, lt, neq, any, find, where } from 'querycraft'
import { Pipeline } from 'querycraft-pipelines'
const contacts: contact[] = [ ... ]
const pipeline = new Pipeline()
.filter(
where('firstName', eq('bob'))
.where('list', find(where('id', eq('item1'))))
.where('lastName', any([
eq('doyle'),
eq(null)
]))
.where('createdAt', lt({ daysAgo: 5 }))
.where('assignedTo', neq(null))
)
.buckets({
fieldId: 'CustomFields',
subFieldIds: ['custom1'],
subFieldProp: 'value',
})