Group operation

[stombre]

Average, sum...

Search for an API;

const result = await Invoices.query()
  .groupBy(Invoices.userId)
  .define('totalDebt').asSumOf(Invoices.amount)
  .define('nbInvoicse').asCountOf(Invoices)
  .find();

Hard scenario, how to do two stage grouping pipeline?

const result = await Invoices.query()
  .stage((query, Invoices) => {
    query.groupBy(query.year(Invoices.createdAt)).as('year')
      .groupBy(query.month(invoicse.createdAt)).as('month')
      .define('averageDebt').asAverageOf(Invoices.amount);
  })
  .stage((query, InvoicesAggregatedByMonthAndYear) => {
    query.groupBy(query.year(InvoicesAggregatedByMonthAndYear.year))
      .define('averageDebt').asAverageOf(InvoicesAggregatedByMonthAndYear.averageDebt))
  });

Need to introduce field defined on Model? sub field;

const result = await Invoices.query()
  .groupBy(Invoices.FIELDS.userId)
  .define('totalDebt').asSumOf(Invoices.FIELDS.amount)
  .define('nbInvoicse').asCountOf(Invoices)
  .find();

• query.groupBy: Apply a groupBy operation
• query.define: Create a property in the result. When define something? it's not a model instance anymore? alternate operation than find? apply? generate? fetch?
• query.stage; multiple group by (support for mongoDb aggregate)
• define.asSumOf
• define.asAverageOf
• define.asCountOf
• define.asMaxOf
• define.asMinOf

How to have access to this in every context?

• query.year (apply a year on a date?)

• query.month (apply a month on a date?)

• query.day (apply a day on a date?)

• query.define

• DEFINE.as

• Schema.FIELDS

• DEFINE.asSumOf

• DEFINE.asAverageOf

• DEFINE.asCountOf

• DEFINE.asMaxOf

• DEFINE.asMinOf

• query.groupBy

• query.stage