Django ImageField设置固定宽度和高度 [英] Django ImageField Setting a Fixed Width and Height

问题描述

我在我的models.py中有以下图像字段（见下面的代码）

I have the following image field in my models.py (see code below)

我想设置固定宽度图像的高度，所以它总是100x100px

I would like to set a fixed width and height of the image so its always 100x100px

下面的代码是系统中已经有的，我不知道如何传递宽度和高度，或者如果这个代码可以用于将宽度和高度设置为修剪大小。

The code below is what was already in the system, I'm not sure how width and height gets passed or if this code can be used to set the width and height to a fix size.

image = models.ImageField(
        upload_to="profiles",
        height_field="image_height",
        width_field="image_width",
        null=True,
        blank=True,
        editable=True,
        help_text="Profile Picture",
        verbose_name="Profile Picture"
    )
    image_height = models.PositiveIntegerField(null=True, blank=True, editable=False, default="100")
    image_width = models.PositiveIntegerField(null=True, blank=True, editable=False, default="100")

推荐答案

class ModelName(models.Model):    
    image = models.ImageField(
        upload_to="profiles",
        null=True,
        blank=True,
        editable=True,
        help_text="Profile Picture",
        verbose_name="Profile Picture"
    )
    image_height = models.PositiveIntegerField(null=True, blank=True, editable=False, default="100")
    image_width = models.PositiveIntegerField(null=True, blank=True, editable=False, default="100")

    def __unicode__(self):
        return "{0}".format(self.image)

    def save(self):
        if not self.image:
            return            

        super(ModelName, self).save()
        image = Image.open(self.photo)
        (width, height) = image.size     
        size = ( 100, 100)
        image = image.resize(size, Image.ANTIALIAS)
        image.save(self.photo.path)

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