在Django中无论何种field,都有一个widget的属性:
1 class Field(object):2widget= TextInput # Default widget to use when rendering this type of Field.3hidden_widget = HiddenInput # Default widget to use when rendering this as "hidden".
如上所示,widget默认是TextInput。
而TextInput是一个继承Input的一个类:
1 class TextInput(Input):2input_type = 'text'3 4def __init__(self, attrs=None):5 if attrs is not None:6 self.input_type = attrs.pop('type', self.input_type)7 super(TextInput, self).__init__(attrs)
往上接着找,Input继承于Widget,不同于Widget的是它有个input_type。当继承Input时需要指明input_type,像上面的TextInput一样指明为'text',类似的,PasswordInput则将其指明为'password'。
1 class Widget(six.with_metaclass(RenameWidgetMethods)): 2needs_multipart_form = False # Determines does this widget need multipart form 3is_localized = False 4is_required = False 5supports_microseconds = True 6 7def __init__(self, attrs=None): 8 if attrs is not None: 9 self.attrs = attrs.copy()10 else:11 self.attrs = {}
在Widget中有个attrs的属性,这个属性其实可以用来设置对应field的html属性。这个属性在Widget的render里会被引用。
所以如果你需要设置某个字段的html属性时,可以这么做:
1 field = forms.CharField()2 field.widget.attrs['readonly']='true'
如果是一个这样的form:
from user.models import Userfrom django import formsclass RegisterForm(forms.ModelForm):class Meta:fields = ('first_name', 'last_name', 'email', 'username',)
你需要这样才能设置field的attrs:
for field in form:field.field.widget.attrs['readonly']='false'
为什么要这样呢?因为ModelForm的Field是一个BoundField:
1 class BoundField(object): 2"A Field plus data" 3def __init__(self, form, field, name): 4 self.form = form 5 self.field = field 6 self.name = name 7 self.html_name = form.add_prefix(name) 8 self.html_initial_name = form.add_initial_prefix(name) 9 self.html_initial_id = form.add_initial_prefix(self.auto_id)10 if self.field.label is None:11 self.label = pretty_name(name)12 else:13 self.label = self.field.label14 self.help_text = field.help_text or ''15 self._initial_value = UNSET
BoundField不像CharField或其他一般的Field,并不是直接继承于Field。所以当你需要获得BoundField的Field的对象的时候,需要使用它的field的属性。