Python django.template.Variable() Examples

def render(self, context):
        request = context["request"]
        post = getattr(request, "POST", None)
        form = template.Variable(self.value).resolve(context)
        t = get_template("forms/includes/built_form.html")
        context["form"] = form
        form_args = (form, context, post or None)
        form_for_form = FormForForm(*form_args)

        # kind of a hack
        # add the 'data-verify' attribute if the field is marked
        # as a verifiable field
        for i, field in enumerate(form_for_form.form_fields):
            if field.verify:
                form_for_form.fields[field.slug].widget.attrs['data-verify'] = True

            # We give to all the form fields a common class so we can reference 
            # them in the frontend
            fieldAttrs = form_for_form.fields[field.slug].widget.attrs
            fieldAttrs['class'] = fieldAttrs['class']  + ' form-field'

        context["form_for_form"] = form_for_form
        return t.render(context) 

def do_form_field(parser, token):
    """
    Render a WTForms form field allowing optional HTML attributes.
    Invocation looks like this:
      {% form_field form.username class="big_text" onclick="alert('hello')" %}
    where form.username is the path to the field value we want.  Any number
    of key="value" arguments are supported. Unquoted values are resolved as
    template variables.
    """
    parts = token.contents.split(' ', 2)
    if len(parts) < 2:
        error_text = '%r tag must have the form field name as the first value, followed by optional key="value" attributes.'
        raise template.TemplateSyntaxError(error_text % parts[0])

    html_attrs = {}
    if len(parts) == 3:
        raw_args = list(args_split(parts[2]))
        if (len(raw_args) % 2) != 0:
            raise template.TemplateSyntaxError('%r tag received the incorrect number of key=value arguments.' % parts[0])
        for x in range(0, len(raw_args), 2):
            html_attrs[str(raw_args[x])] = Variable(raw_args[x + 1])

    return FormFieldNode(parts[1], html_attrs) 

def render(self, context):
        bounded_field = template.Variable(self.field).resolve(context)
        field = bounded_field.field.fields[self.index]
        widget = bounded_field.field.widget.widgets[self.index]

        attrs = widget.attrs.copy()
        print(attrs)
        for k, v in self.assign_dict.items():
            attrs[k] = v.resolve(context)
        for k, v in self.concat_dict.items():
            attrs[k] = widget.attrs.get(k, '') + ' ' + v.resolve(context)
        if bounded_field.errors:
            attrs['class'] = attrs.get('class', '') + ' error'

        if not bounded_field.form.is_bound:
            data = bounded_field.form.initial.get(bounded_field.name,
                                                  field.initial)
            if callable(data):
                data = data()
            data = bounded_field.field.widget.decompress(data)[self.index]
        else:
            data = bounded_field.data[self.index]
        return widget.render('%s_%d' % (bounded_field.html_name, self.index),
                             data, attrs) 

def value_from_settings(parser, token):
    bits = token.split_contents()
    if len(bits) < 2:
        raise TemplateSyntaxError("'%s' takes at least one " \
                                  "argument (settings constant to retrieve)" % bits[0])
    settingsvar = bits[1]
    settingsvar = settingsvar[1:-1] if settingsvar[0] == '"' else settingsvar
    asvar = None
    bits = bits[2:]
    if len(bits) >= 2 and bits[-2] == 'as':
        asvar = bits[-1]
        bits = bits[:-2]
    if len(bits):
        raise TemplateSyntaxError("'value_from_settings' didn't recognise " \
                                  "the arguments '%s'" % ", ".join(bits))
    if settingsvar not in settings.TEMPLATE_ALLOWABLE_SETTINGS_VALUES:
        raise TemplateSyntaxError("The settings Variable %s is not allowed to be acessed" % settingsvar)
    return ValueFromSettings(settingsvar, asvar) 

def do_form_field(parser, token):
    """
    Render a WTForms form field allowing optional HTML attributes.
    Invocation looks like this:
      {% form_field form.username class="big_text" onclick="alert('hello')" %}
    where form.username is the path to the field value we want.  Any number
    of key="value" arguments are supported. Unquoted values are resolved as
    template variables.
    """
    parts = token.contents.split(' ', 2)
    if len(parts) < 2:
        error_text = '%r tag must have the form field name as the first value, followed by optional key="value" attributes.'
        raise template.TemplateSyntaxError(error_text % parts[0])

    html_attrs = {}
    if len(parts) == 3:
        raw_args = list(args_split(parts[2]))
        if (len(raw_args) % 2) != 0:
            raise template.TemplateSyntaxError('%r tag received the incorrect number of key=value arguments.' % parts[0])
        for x in range(0, len(raw_args), 2):
            html_attrs[str(raw_args[x])] = Variable(raw_args[x + 1])

    return FormFieldNode(parts[1], html_attrs) 

def render(self, context):
        try:
            if '.' in self.field_var:
                base, field_name = self.field_var.rsplit('.', 1)
                field = getattr(Variable(base).resolve(context), field_name)
            else:
                field = context[self.field_var]
        except (template.VariableDoesNotExist, KeyError, AttributeError):
            return settings.TEMPLATE_STRING_IF_INVALID

        h_attrs = {}
        for k, v in iteritems(self.html_attrs):
            try:
                h_attrs[k] = v.resolve(context)
            except template.VariableDoesNotExist:
                h_attrs[k] = settings.TEMPLATE_STRING_IF_INVALID

        return field(**h_attrs) 

def render(self, context):
        try:
            if '.' in self.field_var:
                base, field_name = self.field_var.rsplit('.', 1)
                field = getattr(Variable(base).resolve(context), field_name)
            else:
                field = context[self.field_var]
        except (template.VariableDoesNotExist, KeyError, AttributeError):
            return settings.TEMPLATE_STRING_IF_INVALID

        h_attrs = {}
        for k, v in iteritems(self.html_attrs):
            try:
                h_attrs[k] = v.resolve(context)
            except template.VariableDoesNotExist:
                h_attrs[k] = settings.TEMPLATE_STRING_IF_INVALID

        return field(**h_attrs) 

def render(self, context):

        # add all of the use_macros args into context
        for i, arg in enumerate(self.macro.args):
            try:
                template_variable = self.args[i]
                context[arg] = template_variable.resolve(context)
            except IndexError:
                context[arg] = ""

        # add all of use_macros kwargs into context
        for name, default in self.macro.kwargs.items():
            if name in self.kwargs:
                context[name] = self.kwargs[name].resolve(context)
            else:
                if isinstance(default, template.Variable):
                    # variables must be resolved explicitly,
                    # because otherwise if macro's loaded from
                    # a separate file things will break
                    context[name] = default.resolve(context)
                else:
                    context[name] = default

        # return the nodelist rendered in the adjusted context
        return self.macro.nodelist.render(context) 

def render(self, context):

        # add all of the use_macros args into context
        for i, arg in enumerate(self.macro.args):
            try:
                template_variable = self.args[i]
                context[arg] = template_variable.resolve(context)
            except IndexError:
                context[arg] = ""

        # add all of use_macros kwargs into context
        for name, default in self.macro.kwargs.items():
            if name in self.kwargs:
                context[name] = self.kwargs[name].resolve(context)
            else:
                if isinstance(default, template.Variable):
                    # variables must be resolved explicitly,
                    # because otherwise if macro's loaded from
                    # a separate file things will break
                    context[name] = default.resolve(context)
                else:
                    context[name] = default

        # return the nodelist rendered in the adjusted context
        return self.macro.nodelist.render(context) 

def render(self, context):

        # add all of the use_macros args into context
        for i, arg in enumerate(self.macro.args):
            try:
                template_variable = self.args[i]
                context[arg] = template_variable.resolve(context)
            except IndexError:
                context[arg] = ""

        # add all of use_macros kwargs into context
        for name, default in self.macro.kwargs.items():
            if name in self.kwargs:
                context[name] = self.kwargs[name].resolve(context)
            else:
                if isinstance(default, template.Variable):
                    # variables must be resolved explicitly,
                    # because otherwise if macro's loaded from
                    # a separate file things will break
                    context[name] = default.resolve(context)
                else:
                    context[name] = default

        # return the nodelist rendered in the adjusted context
        return self.macro.nodelist.render(context) 

def render(self, context):
        try:
            if '.' in self.field_var:
                base, field_name = self.field_var.rsplit('.', 1)
                field = getattr(Variable(base).resolve(context), field_name)
            else:
                field = context[self.field_var]
        except (template.VariableDoesNotExist, KeyError, AttributeError):
            return settings.TEMPLATE_STRING_IF_INVALID

        h_attrs = {}
        for k, v in iteritems(self.html_attrs):
            try:
                h_attrs[k] = v.resolve(context)
            except template.VariableDoesNotExist:
                h_attrs[k] = settings.TEMPLATE_STRING_IF_INVALID

        return field(**h_attrs) 

def do_form_field(parser, token):
    """
    Render a WTForms form field allowing optional HTML attributes.
    Invocation looks like this:
      {% form_field form.username class="big_text" onclick="alert('hello')" %}
    where form.username is the path to the field value we want.  Any number 
    of key="value" arguments are supported. Unquoted values are resolved as
    template variables.
    """
    parts = token.contents.split(' ', 2)
    if len(parts) < 2:
        raise template.TemplateSyntaxError('%r tag must have the form field name as the first value, followed by optional key="value" attributes.' % parts[0])

    html_attrs = {}
    if len(parts) == 3:
        raw_args = list(args_split(parts[2]))
        if (len(raw_args) % 2) != 0:
            raise template.TemplateSyntaxError('%r tag received the incorrect number of key=value arguments.' % parts[0])
        for x in range(0, len(raw_args), 2):
            html_attrs[str(raw_args[x])] = Variable(raw_args[x+1])

    return FormFieldNode(parts[1], html_attrs) 

def render(self, context):

        # add all of the use_macros args into context
        for i, arg in enumerate(self.macro.args):
            try:
                template_variable = self.args[i]
                context[arg] = template_variable.resolve(context)
            except IndexError:
                context[arg] = ""

        # add all of use_macros kwargs into context
        for name, default in self.macro.kwargs.items():
            if name in self.kwargs:
                context[name] = self.kwargs[name].resolve(context)
            else:
                if isinstance(default, template.Variable):
                    # variables must be resolved explicitly,
                    # because otherwise if macro's loaded from
                    # a separate file things will break
                    context[name] = default.resolve(context)
                else:
                    context[name] = default

        # return the nodelist rendered in the adjusted context
        return self.macro.nodelist.render(context) 

def __init__(self, macro, args, kwargs):
        # all the values kwargs and the items in args
        # are by assumption template.Variable instances.
        self.macro = macro
        self.args = args
        self.kwargs = kwargs 

def __init__(self, name, nodelist, args, kwargs):
        # the values in the kwargs dictionary are by
        # assumption instances of template.Variable.
        self.name = name
        self.nodelist = nodelist
        self.args = args
        self.kwargs = kwargs 

def __init__(self, macro, args, kwargs):
        # all the values kwargs and the items in args
        # are by assumption template.Variable instances.
        self.macro = macro
        self.args = args
        self.kwargs = kwargs 

def __init__(self, name, nodelist, args, kwargs):
        # the values in the kwargs dictionary are by
        # assumption instances of template.Variable.
        self.name = name
        self.nodelist = nodelist
        self.args = args
        self.kwargs = kwargs 

def __init__(self, nodelist, expire_time_var, fragment_name, vary_on):
        self.nodelist = nodelist
        self.expire_time_var = Variable(expire_time_var)
        self.fragment_name = fragment_name
        self.vary_on = vary_on 

def __init__(self, obj, tpl=None):
        self.obj = template.Variable(obj)
        self.template = tpl[1:-1] if tpl else 'follow/form.html' 

def __init__(self, context_name, starts_with=None, user=None):
        self.context_name = context_name
        if starts_with:
            self.starts_with = template.Variable(starts_with)
        else:
            self.starts_with = None
        if user:
            self.user = template.Variable(user)
        else:
            self.user = None 

def __init__(self, macro, args, kwargs):
        # all the values kwargs and the items in args
        # are by assumption template.Variable instances.
        self.macro = macro
        self.args = args
        self.kwargs = kwargs 

def render(self, context):
        obj = self.obj.resolve(context)
        
        if not self.user:
            try:
                user = context['request'].user
            except KeyError:
                raise template.TemplateSyntaxError('There is no request object in the template context.')
        else:
            user = template.Variable(self.user).resolve(context)
        
        return utils.follow_url(user, obj) 

def __init__(self, obj, user=None):
        self.obj = template.Variable(obj)
        self.user = user 

def __init__(self, filter_expression, noop, asvar=None,
                 message_context=None):
        self.noop = noop
        self.asvar = asvar
        self.message_context = message_context
        self.filter_expression = filter_expression
        if isinstance(self.filter_expression.var, six.string_types):
            self.filter_expression.var = Variable("'%s'" %
                                                  self.filter_expression.var) 

def what(self, page, args, default=None):
        language = args.get('language',False)
        if not language:
            language = settings.LANGUAGES[0][0]
        elif language not in (x[0] for x in settings.LANGUAGES):
            language = template.Variable(language).resolve(self.render_context)

        return _translate_page_into(page, language, default=default) 

def test_render_none_as_context_variable(self):
        """
        Tests that an ImageNode without an image and a context variable name
        renders an empty string and puts None in the context variable
        """
        context = {'image': None, 'image_node': 'fake value'}
        node = ImageNode(Variable('image'), 'original', 'image_node')

        rendered = node.render(context)

        self.assertEqual(rendered, '')
        self.assertIsNone(context['image_node']) 

def test_render_valid_image_as_context_variable(self):
        """
        Tests that an ImageNode with a valid image and a context variable name
        renders an empty string and puts a rendition in the context variable
        """
        context = {'image': self.image, 'image_node': 'fake value'}
        node = ImageNode(Variable('image'), 'original', 'image_node')

        rendered = node.render(context)

        self.assertEqual(rendered, '')
        self.assertIsInstance(context['image_node'], Rendition) 

def test_render_none_to_string(self):
        """
        Tests that an ImageNode without image renders an empty string
        """
        context = {'image': None}
        node = ImageNode(Variable('image'), 'original')

        rendered = node.render(context)

        self.assertEqual(rendered, '') 

def test_render_valid_image_to_string(self):
        """
        Tests that an ImageNode with a valid image renders an img tag
        """
        context = {'image': self.image}
        node = ImageNode(Variable('image'), 'original')

        rendered = node.render(context)

        self.assertIn('<img alt="Test image"', rendered) 

def __init__(self, filter_expression, noop, asvar=None,
                 message_context=None):
        self.noop = noop
        self.asvar = asvar
        self.message_context = message_context
        self.filter_expression = filter_expression
        if isinstance(self.filter_expression.var, six.string_types):
            self.filter_expression.var = Variable("'%s'" %
                                                  self.filter_expression.var)