小编cat*_*ran的帖子

我通过jquery-fileupload-rails gem 在Rails 3.2应用程序中使用blueimp jquery-file-upload.

我正在尝试在上传之前在客户端调整图像大小,但是在访问文档时遇到了问题.我的代码如下.目前上传效果很好,但图片没有调整大小.

通过jquery-file-upload调整图像大小的正确语法是什么.

(基于此和本文档的coffeescript中显示了两种方法.对我来说都不适用.)

#Coffeescript

jQuery ->
  if $("#new_asset").length
    $("#new_asset").fileupload 
      dataType: "script"
      add: (e, data) ->
        types = /(\.|\/)(jpe?g|png)$/i
        file = data.files[0]
        if types.test(file.type) || types.test(file.name)
          data.context = $(tmpl("template-upload", file))
          $('#progress-container').append(data.context)
          jqXHR = data.submit()
          $("button.cancel").click (e) ->
            jqXHR.abort()
        else
          alert("#{file.name} is not a jpeg or png image file")
      progress: (e, data) ->
        if data.context
          progress = parseInt(data.loaded / data.total * 100, 10)
          data.context.find('.bar').css('width', progress + '%')
      stop: (e, data) …

我有一个主模型，可以为不同公司的不同类型的凭证自动创建字母数字。如何更新主模型。型号：

class VoucherTypeMaster(models.Model):
    code = models.CharField(max_length=12,null=True,blank=True)
    description = models.CharField(max_length=30,null=True,blank=True)
    last_number = models.IntegerField(null=True,blank=True)
    company = models.ForeignKey(Company,
                                   related_name='voucher_master_company')
    class Meta:
        unique_together = ('code','company')

class Voucher(models.Model):
    type = models.ForeignKey(VoucherTypeMaster)
    date = models.DateField(default=datetime.datetime.now().date())
    company = models.ForeignKey(Company,
                                  related_name='voucher_company')
    number = models.CharField(max_length=20,null=True,blank=True)
    narration = models.CharField(max_length=30,null=True,blank=True)
    amount = models.DecimalField(decimal_places=2,max_digits=9)

    # class Meta:
        # unique_together = ('company','number','date')

    def __unicode__(self):
        return '%s - %s' %(self.number,self.narration)

    def save(self, *args, **kwargs):
        try:
            voucher_type = VoucherTypeMaster.objects.get(
                company=self.company,
                code=self.type.code
                )
            voucher_type.last_number += 1
            voucher_type.save()
            self.number = voucher_type.last_number
#            self.type.save() # throws exception
        except …