Command.exists(value: boolean): Command

Support: Small program 2.8.3, cloud function 1.2.1, Web

Determine if a field exists

Parameters

value: boolean

Returns a value

Command

The sample code

Find records that have tags fields

const _ = db.command
db.collection('todos').where({
  tags: _.exists(true)
})
.get({
  success: console.log,
  fail: console.error
})

Command.mod(divisor: number, remainder: number): Command

Support: Small program 2.8.3, cloud function 1.2.1, Web

The query filter operator, given the divisor and the remainder, requires the field to be divided when the value % divisor is the remainder.

Parameters

divisor: number

remainder: number

Returns a value

Command

The sample code

Find a record of a field with a progress of 10

const _ = db.command
db.collection('todos').where({
  progress: _.mod(10, 0)
})
.get({
  success: console.log,
  fail: console.error
})