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@mrtnzagustin
Last active April 19, 2020 16:58
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Custom find.js for Sails Models with record count based on limit or defaultLimit
function find (req, res) {
// Source: https://github.com/balderdashy/sails/tree/master/lib/hooks/blueprints/actions/find.js
var actionUtil = require('sails/lib/hooks/blueprints/actionUtil')
var formatUsageError = require('sails/lib/hooks/blueprints/formatUsageError')
var parseBlueprintOptions = req.options.parseBlueprintOptions || req._sails.config.blueprints.parseBlueprintOptions
// Set the blueprint action for parseBlueprintOptions.
req.options.blueprintAction = 'find'
var queryOptions = parseBlueprintOptions(req)
var Model = req._sails.models[queryOptions.using]
Model
.find(queryOptions.criteria, queryOptions.populates).meta(queryOptions.meta)
.exec(function found (err, matchingRecords) {
if (err) {
// If this is a usage error coming back from Waterline,
// (e.g. a bad criteria), then respond w/ a 400 status code.
// Otherwise, it's something unexpected, so use 500.
switch (err.name) {
case 'UsageError': return res.badRequest(formatUsageError(err, req))
default: return res.serverError(err)
}
}// -•
// Socket considerations
if (req._sails.hooks.pubsub && req.isSocket) {
Model.subscribe(req, _.pluck(matchingRecords, Model.primaryKey))
// Only `._watch()` for new instances of the model if
// `autoWatch` is enabled.
if (req.options.autoWatch) { Model._watch(req) }
// Also subscribe to instances of all associated models
_.each(matchingRecords, function (record) {
actionUtil.subscribeDeep(req, record)
})
}// >-
// ┬┌┐┌┬┌─┐┬┌─┐ ┌─┐┌─┐┌┬┐┬┌─┐┌─┐ ┌─┐┬ ┬┌─┐┌┬┐┌─┐┌┬┐
// ││││││ ││ │ │ │ │ ││││ ┬│ │ │ │ │└─┐ │ │ ││││
// ┴┘└┘┴└─┘┴└─┘ └─┘└─┘─┴┘┴└─┘└─┘ └─┘└─┘└─┘ ┴ └─┘┴ ┴
// Removes not valid criteria options for count method
const countCriteria = _.omit(queryOptions.criteria, ['select', 'omit', 'limit', 'skip', 'sort'])
// Executes count
Model.count(countCriteria).exec(function count (err, numRecords) {
// Default waterline example error handler
if (err) {
// If this is a usage error coming back from Waterline,
// (e.g. a bad criteria), then respond w/ a 400 status code.
// Otherwise, it's something unexpected, so use 500.
switch (err.name) {
case 'UsageError': return res.badRequest(formatUsageError(err, req))
default: return res.serverError(err)
}
}// -•
// ┌─┐┌─┐┌─┐┬┌┐┌┌─┐┌─┐┬┌─┐┌┐┌
// ├─┘├─┤│ ┬││││├─┤│ ││ ││││
// ┴ ┴ ┴└─┘┴┘└┘┴ ┴└─┘┴└─┘┘└┘
const pagination = {}
// If there's not limit indication in query, set default blueprint limit
if (queryOptions.criteria.limit === undefined) {
pagination.perPage = sails.config.custom.blueprints.defaultLimit
} else { // If there's a limit indication, uses it at perPage param
pagination.perPage = queryOptions.criteria.limit
}
pagination.totalPages = Math.ceil(numRecords / pagination.perPage)
pagination.totalEntries = numRecords
// ┌─┐┬┌┐┌ ┌─┐┌─┐┌─┐┬┌┐┌┌─┐┌─┐┬┌─┐┌┐┌
// ├┤ ││││ ├─┘├─┤│ ┬││││├─┤│ ││ ││││
// └ ┴┘└┘ ┴ ┴ ┴└─┘┴┘└┘┴ ┴└─┘┴└─┘┘└┘
if (queryOptions.criteria.skip && queryOptions.criteria.skip % pagination.perPage !== 0) {
return res.badRequest(
new Error(`El parametro skip es invalido (se envió ${queryOptions.criteria.skip}), debe ser '0' o un múltiplo de limit (limitIndicado o default = ${pagination.perPage})`)
)
}
// Return your custom response, you also can use res.json with custom format
return res.getCollection({
results: matchingRecords,
pagination
})
})// </ .count().exec() >
// ┌─┐┬┌┐┌ ┌─┐┌─┐┌┬┐┬┌─┐┌─┐ ┌─┐┬ ┬┌─┐┌┬┐┌─┐┌┬┐
// ├┤ ││││ │ │ │ ││││ ┬│ │ │ │ │└─┐ │ │ ││││
// └ ┴┘└┘ └─┘└─┘─┴┘┴└─┘└─┘ └─┘└─┘└─┘ ┴ └─┘┴ ┴
})// </ .find().exec() >
}
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