django-user-media 1.2.5
A reusable app to graceously handle files that your users might upload, such

as profile pictures, foto albums etc...

Home-page: https://github.com/bitmazk/django-user-media
Author: Martin Brochhaus
Author-email: martin.brochhaus@bitmazk.com
License: The MIT License
Description: Django User Media
        =================
        
        Almost all modern web apps allow their users to upload content such as audio,
        video or images. This raises a number of issues if that content should not be
        visible to the whole world by default.
        
        If you add an ImageField to your user model, you need to come up with a good
        idea on how to save those images. It is probably not a good idea to keep the
        original filenames as they might disturb your server's file system and open
        doors for hackers, who might try to brute-force against your
        ``/media/user_profiles/`` in the hope to steal some valuable files.
        
        Since it seems inevitable to implement a function for Django's FileField's
        ``upload_to`` attribute I thought that this might be a candidate for a reusable
        app.
        
        
        Prerequisites
        -------------
        
        You need at least the following packages in your virtualenv:
        
        * Django
        * django-libs
        * easy_thumbnails
        * django-generic-positions
        * simplejson
        
        
        Installation
        ------------
        
        To get the latest stable release from PyPi::
        
            $ pip install django-user-media
        
        To get the latest commit from GitHub::
        
            $ pip install -e git://github.com/bitmazk/django-user-media.git#egg=user_media
        
        Add the app to your ``INSTALLED_APPS``::
        
            INSTALLED_APPS = [
                ...
                'user_media',
                'easy_thumbnails',
                'django_libs',
                'generic_positions',
        
            ]
        
        Hook the app into your main ``urls.py``::
        
            urlpatterns += patterns('',
                ...
                url(r'^umedia/', include('user_media.urls')),
            )
        
        Run the migrations to create the app's database tables::
        
            $ ./manage.py migrate user_media
        
        
        Usage
        -----
        
        
        Add generic relation
        ++++++++++++++++++++
        
        Let's assume that you have a ``UserProfile`` model and you want to add an
        ``avatar`` field to that model.
        
        First you might want to add a [``GenericRelation``](https://docs.djangoproject.com/en/1.8/ref/contrib/contenttypes/#django.contrib.contenttypes.fields.GenericRelation) to your ``UserProfile``
        model::
        
            from django.contrib.contenttypes import fields
        
        
            class UserProfile(models.Model):
                ...
                user = models.ForeignKey(
                    getattr(settings, 'AUTH_USER_MODEL', 'auth.User'),
                )
        
                avatar = fields.GenericRelation(
                    'user_media.UserMediaImage',
                )
        
        
        Add property
        ++++++++++++
        
        Now you will be able to get all uploaded images that belong to a
        ``UserProfile`` by doing this::
        
            profile = UserProfile.objects.get(pk=1)
            images = profile.avatar.all()
        
        It makes sense to add a convenience method to your ``UserProfile`` model::
        
            class UserProfile(models.Model):
                ...
                @property
                def avatar(self):
                    try:
                        return self.avatar.all()[0]
                    except IndexError:
                        return None
        
        
        Add link to update form
        +++++++++++++++++++++++
        
        In your templates you can now provide a link to the image creation view like
        this (assuming that your ``UserProfile`` object is called ``object`` in the
        template's context)::
        
            <a href="{% url "user_media_image_create" content_type="userprofile" object_id=object.pk %}">Upload your picture</a>
        
        Note that ``userprofile`` is the model name that the ``ContentType`` of your
        ``UserProfile`` model would return. You can figure this out with ``./manage.py
        shell`` for example::
        
            $ ./manage.py shell
            In [1]: from django.contrib.contenttypes.models import ContentType
            In [2]: from your_app.models import UserProfile
            In [3]: ContentType.objects.get_for_model(UserProfile).model
            Out [1]: u'userprofile'
        
        When visiting that link, the user will see an image upload form. You might
        want to override that template (``user_media/usermediaimage_form.html``).
        
        After uploading the image the view should redirect back to the absolute url
        of your ``UserProfile``. If you want to redirect to another URL, you can
        provide a ``next`` URL parameter via POST or GET::
        
                <a href="{% url "user_media_image_create" content_type="userprofile" object_id=object.pk %}?next=/foo/bar">Upload your picture</a>
        
        
        Display images
        ++++++++++++++
        
        Now you should have all building blocks that you need to add links or buttons
        to your templates that call the views of this application. On your
        ``UserProfile`` detail view you could display the avatar, if available::
        
            {% if object.avatar %}
                <img src="{{ MEDIA_URL }}{{ object.avatar.image }}" />
            {% endif %}
        
        
        Delete and edit images
        ++++++++++++++++++++++
        
        Or in your ``UserProfile`` update view you could display a link to upload a
        new image or to delete the existing image::
        
            {% if form.instance.get_avatar %}
                <p><img src="{{ MEDIA_URL }}{{ form.instance.avatar.image }}" /></p>
                <a href="{% url "user_media_image_delete" pk=form.instance.avatar.pk %}">Delete picture</a>
            {% else %}
                <a href="{% url "user_media_image_create" content_type="userprofile" object_id=form.instance.pk %}">Add profile picture</a>
            {% endif %}
        
        The delete link in this example will render the
        ``user_media/usermediaimage_confirm_delete.html`` template, which you might
        want to override in your project.
        
        A link for editing an existing image would look like this::
        
                <a href="{% url "user_media_image_edit" pk=form.instance.avatar.pk %}">Edit picture</a>
        
        
        Upload from your own model form
        +++++++++++++++++++++++++++++++
        
        Often you might not want to provide a dedicated form for uploading images but
        you might want to have an image field right on the model form of your content
        object. In this case you can inherit from `UserMediaImageFormMixin`::
        
            from django import forms
            from user_media.forms import UserMediaImageFormMixin
            from yourapp.models import UserProfile
        
            class UserProfileForm(UserMediaImageFormMixin, forms.ModelForm):
                image_label = _('Image')
                require_user_media_image = False
                image_field_name = 'user_media_image'
                image_widget = forms.ClearableFileInput()  # optional
        
                # your form implementation
        
        The mixin will dynamically add a `forms.ImageField` with the name
        `user_media_image` to your form. You can control the label of that field by
        setting the `image_label` attribute on your form class. You can also make the
        field mandatory by setting the `require_user_media_image` attribute to `True`.
        
        AJAX calls
        ----------
        
        You might want to call the ``CreateImageView`` from an AJAX call, i.e. when
        displaying the form in a jQuery modal. To make life easier the view will
        return a different template when the request is an AJAX call.
        
        The names of the alternative templates are
        ``user_media/partials/ajax_usermediaimage_form.html`` and
        ``user_media/partials/ajax_usermediaimage_confirm_delete.html``.
        
        Make sure to add a user field to the object::
        
            user = models.ForeignKey(
                getattr(settings, 'AUTH_USER_MODEL', 'auth.User'),
                verbose_name=_('User'),
            )
        
        Alternatively you can add a function called ``user_can_edit``: ::
        
            def user_can_edit(self, user):
                """
                Function, which returns True if the user is allowed edit the instance.
        
                """
                if user in self.users.all():
                    return True
                return False
        
        
        AJAX multi image upload
        -----------------------
        
        If you want to upload multiple images at once, only prepare the following
        templates::
        
            user_media/partials/image_upload.html
            user_media/partials/image.html
        
        Then add styles and jQuery scripts. We've used blueimp's file upload, so you
        make it work by adding jQuery & jQuery-UI plus the scripts in::
        
            user_media/partials/image_upload_scripts.html
        
        Now include the form::
        
            {% include "user_media/partials/image_upload.html" with object=request.user.get_profile maximum='5' hide_cutout='0' mode="multiple" c_type="profile" %}
        
        You can use the variable `hide_cutout="0"` to hide the link that triggers the
        jQuery crop functionality.
        
        You can limit the maximum upload by using the following setting::
        
            USER_MEDIA_UPLOAD_MAXIMUM = 5
        
        
        AJAX single image upload
        ------------------------
        
        You can also combine single and multiple uploads. Just use the templates and
        add the wanted variables::
        
            {% include "user_media/partials/image_upload.html" with object=request.user.get_profile field='logo' mode="single" show_main_thumb="True" %}
        
        Extra classes for newly loaded image
        ------------------------------------
        
        If you are using the single image upload, your newly uploaded image will
        replace the current `img`-element in your `userMediaImageUploaded`-element.
        Sometimes you might have special CSS classes on your images and you might want
        to add those classes again to the `img` that has just been added to the DOM. In
        order to define the classes that should be added to newly loaded image, just
        add the `data-img-class="myclass1 myclass2"` attribute to the element that has
        the `userMediaImageUploaded` class.
        
        jQuery image cropping
        ---------------------
        
        You can easily add a frontend image cropping. First of all, add a new thumbnail
        processor ``user_media.processors.crop_box``::
        
            THUMBNAIL_PROCESSORS = (
                'user_media.processors.crop_box',
                ...
                'easy_thumbnails.processors.colorspace',
                'easy_thumbnails.processors.autocrop',
                'easy_thumbnails.processors.scale_and_crop',
                'easy_thumbnails.processors.filters',
            )
        
        Then add the cropping template and the relevant js libraries::
        
            {% include "user_media/partials/crop.html" %}
        
            <script src="{% static "django_libs/js/getcookie.js" %}"></script>
            <script src="{% static "user_media/js/libs/jquery.Jcrop.js" %}"></script>
        
        You can modify the settings by overwriting the input fields in ``crop.html``.
        
        Check out: http://deepliquid.com/content/Jcrop.html
        
        Now, if a user clicks on ``Select another cutout``, the original image will be
        pushed into the crop area, where the user is able to select a frame. If she
        then saves the cropped area, the coordinates will be saved to the
        ``UserMediaImage`` instance.
        
        By using the new thumbnail processor it's easy to use this coordinates to
        generate thumbnails::
        
            {% thumbnail image.image image.small_size box=image.box_coordinates %}
        
        
        Settings
        --------
        
        USER_MEDIA_THUMB_SIZE_SMALL
        +++++++++++++++++++++++++++
        
        Default: (95, 95)
        
        Size of the small auto-generated thumbnails, which are processed after
        upload/cropping.
        
        
        USER_MEDIA_THUMB_SIZE_LARGE
        +++++++++++++++++++++++++++
        
        Default: (150, 150)
        
        Size of the large auto-generated thumbnails, which are processed after
        upload/cropping.
        
        
        USER_MEDIA_UPLOAD_MAXIMUM
        +++++++++++++++++++++++++
        
        Default: 3
        
        Amount of images to be uploaded at a maximum.
        
        
        Contribute
        ----------
        
        If you want to contribute to this project, please perform the following steps
        
        .. code-block:: bash
        
            # Fork this repository
            # Clone your fork
            mkvirtualenv -p python2.7 django-user-media
            make develop
        
            git co -b feature_branch master
            # Implement your feature and tests
            git add . && git commit
            git push -u origin feature_branch
            # Send us a pull request for your feature branch
        
        In order to run the tests, simply execute ``tox``. This will install two new
        environments (for Django 1.8 and Django 1.9) and run the tests against both
        environments.
        
Keywords: django,common,reusable,media,files,upload
Platform: OS Independent