apx-helper-crud/lib/crud.js

CRUD (Create Read Update Delete) helper for APX API server actions

var util = require('util')
  , async = require('async')

/**
 * Find rows based on criteria
 * @param Model
 * @param data
 * @param fn
 */
exports.find = function(Model,data,fn){
  Model.find(data,function(err,results){
    if(err) fn(err)
    else {
      results.forEach(function(v,i,o){
        o[i] = v.toJSON({virtuals: true})
      })
      fn(null,results)
    }
  })
}

/**
 * Find single row by criteria
 * @param Model
 * @param data
 * @param fn
 */
exports.findOne = function(Model,data,fn){
  Model.findOne(data,function(err,result){
    if(err) fn(err)
    else {
      fn(null,result.toJSON({virtuals: true}))
    }
  })
}

/**
 * List rows and control filtering
 * @param Model
 * @param data
 * @param fn
 */
exports.list = function(Model,data,fn){
  if(!data) data = {}
  var search = {}
  search.start = data.start || 0
  search.limit = data.limit || 10
  search.find = data.search || null
  search.sort = data.sort || ''
  Model.list(search,function(err,count,results){
    if(err) fn(err)
    else {
      results.forEach(function(v,i,o){
        o[i] = v.toJSON({virtuals: true})
      })
      fn(null,count,results)
    }
  })
}

/**
 * Save one or many rows and return the updated model
 * @param Model
 * @param data
 * @param fn
 */
exports.save = function(Model,data,fn){
  if(undefined === data) fn('no params passed')
  else {
    var response = []
    if(!util.isArray(data) && 'object' === typeof data)
      data = [data]
    async.each(
      data,
      function(v,next){
        Model.findById(v._id,function(err,row){
          if(err)
            next(err)
          else {
            if(null === row){
              row = new Model(v)
            } else {
              row.merge(v)
            }
            row.save(function(err,result){
              if(err)
                next(err)
              else {
                response.push(result.toJSON({virtuals: true}))
                next()
              }
            })
          }
        })
      },
      function(err){
        if(err) fn(err)
        else {
          if(1 === response.length) response = response[0]
          fn(null,response)
        }
      }
    )
  }
}

/**
 * Remove one or many rows
 * @param Model
 * @param data
 * @param fn
 */
exports.remove = function(Model,data,fn){
  if(undefined === data) fn('no params passed')
  else {
    if('string' === typeof data || !util.isArray(data) && 'object' === typeof data)
      data = [data]
    async.each(
      data,
      function(v,next){
        Model.remove(v,function(err){
          next(err)
        })
      },
      fn
    )
  }
}