from http://www.djangosnippets.org/snippets/792/
from utils.extjs import ExtJSONEncoder
from django.utils.safestring import mark_safe
class TestForm(forms.ModelForm):
class Meta:
model = TestModel
def as_ext(self):
return mark_safe(simplejson.dumps(self,cls=ExtJSONEncoder))
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | from copy import copy, deepcopy
from django import forms
from django.core.serializers.json import DjangoJSONEncoder
from django.forms import fields
from django.forms.forms import BoundField
from django.forms.models import ModelChoiceField, ModelMultipleChoiceField
class ExtJSONEncoder(DjangoJSONEncoder):
"""
JSONEncoder subclass that knows how to encode django forms into ExtJS config objects.
"""
CHECKBOX_EDITOR = {
'xtype': 'checkbox'
}
COMBO_EDITOR = {
#'listWidth': 'auto',
'width': 150,
'xtype': 'combo',
#'xtype': 'jsoncombo',
}
DATE_EDITOR = {
'xtype': 'datefield'
}
EMAIL_EDITOR = {
'vtype':'email',
'xtype': 'textfield'
}
NUMBER_EDITOR = {
'xtype': 'numberfield'
}
NULL_EDITOR = {
'fieldHidden': True,
'xtype': 'textfield'
}
TEXT_EDITOR = {
'xtype': 'textfield'
}
TIME_EDITOR = {
'xtype': 'timefield'
}
URL_EDITOR = {
'vtype':'url',
'xtype': 'textfield'
}
CHAR_PIXEL_WIDTH = 8
EXT_DEFAULT_CONFIG = {
'editor': TEXT_EDITOR
#'labelWidth': 300,
#'autoWidth': True,
}
DJANGO_EXT_FIELD_TYPES = {
fields.BooleanField: ["Ext.form.Checkbox", CHECKBOX_EDITOR],
fields.CharField: ["Ext.form.TextField", TEXT_EDITOR],
fields.ChoiceField: ["Ext.form.ComboBox", COMBO_EDITOR],
fields.DateField: ["Ext.form.DateField", DATE_EDITOR],
fields.DateTimeField: ["Ext.form.DateField", DATE_EDITOR],
fields.DecimalField: ["Ext.form.NumberField", NUMBER_EDITOR],
fields.EmailField: ["Ext.form.TextField", EMAIL_EDITOR],
fields.IntegerField: ["Ext.form.NumberField", NUMBER_EDITOR],
ModelChoiceField: ["Ext.form.ComboBox", COMBO_EDITOR],
ModelMultipleChoiceField: ["Ext.form.ComboBox", COMBO_EDITOR],
fields.MultipleChoiceField: ["Ext.form.ComboBox",COMBO_EDITOR],
#NullField: ["Ext.form.TextField", NULL_EDITOR],
fields.NullBooleanField: ["Ext.form.Checkbox", CHECKBOX_EDITOR],
#BooleanField: ["Ext.form.Checkbox", CHECKBOX_EDITOR],
fields.SplitDateTimeField: ["Ext.form.DateField", DATE_EDITOR],
fields.TimeField: ["Ext.form.DateField", TIME_EDITOR],
fields.URLField: ["Ext.form.TextField", URL_EDITOR],
}
EXT_DATE_ALT_FORMATS = 'm/d/Y|n/j/Y|n/j/y|m/j/y|n/d/y|m/j/Y|n/d/Y|m-d-y|m-d-Y|m/d|m-d|md|mdy|mdY|d|Y-m-d'
EXT_TIME_ALT_FORMATS = 'm/d/Y|m-d-y|m-d-Y|m/d|m-d|d'
DJANGO_EXT_FIELD_ATTRS = {
#Key: django field attribute name
#Value: tuple[0] = ext field attribute name,
# tuple[1] = default value
'choices': ['store', None],
#'default': ['value', None],
'fieldset': ['fieldSet', None],
'help_text': ['helpText', None],
'initial': ['value', None],
#'input_formats': ['altFormats', None],
'label': ['fieldLabel', None],
'max_length': ['maxLength', None],
'max_value': ['maxValue', None],
'min_value': ['minValue', None],
'name': ['name', None],
'required': ['allowBlank', False],
'size': ['width', None],
'hidden': ['fieldHidden', False],
}
def default(self, o, form=None, field_name=None):
if issubclass(o.__class__, (forms.Form,forms.BaseForm)):
flds = []
for name, field in o.fields.items():
if isinstance(field, dict):
field['title'] = name
else:
field.name = name
cfg = self.default(field, o, name)
flds.append(cfg)
return flds
elif isinstance(o, dict):
#Fieldset
default_config = {
'autoHeight': True,
'collapsible': True,
'items': [],
'labelWidth': 200,
'title': o['title'],
'xtype':'fieldset',
}
del o['title']
#Ensure fields are added sorted by position
for name, field in sorted(o.items()):
field.name = name
default_config['items'].append(self.default(field))
return default_config
elif issubclass(o.__class__, fields.Field):
#bf = form and form.is_bound and BoundField(form, o, field_name) or None
bf = BoundField(form, o, field_name)
print field_name , o.__class__
default_config = {}
if o.__class__ in self.DJANGO_EXT_FIELD_TYPES:
default_config.update(self.DJANGO_EXT_FIELD_TYPES[o.__class__][1])
else:
default_config.update(self.EXT_DEFAULT_CONFIG['editor'])
config = deepcopy(default_config)
if bf:
config['invalidText']="".join(form[field_name].errors)
if form and form.is_bound:
data = bf.data
else:
if field_name:
data = form.initial.get(field_name, o.initial)
if callable(data):
data = data()
else:
data = None
config['value'] = data
for dj, ext in self.DJANGO_EXT_FIELD_ATTRS.items():
v = None
if dj == 'size':
v = o.widget.attrs.get(dj, None)
if v is not None:
if o.__class__ in (fields.DateField, fields.DateTimeField,
fields.SplitDateTimeField, fields.TimeField):
v += 8
#Django's size attribute is the number of characters,
#so multiply by the pixel width of a character
v = v * self.CHAR_PIXEL_WIDTH
elif dj == 'hidden':
v = o.widget.attrs.get(dj, default_config.get('fieldHidden', ext[1]))
elif dj == 'name':
v = bf and bf.html_name or field_name
elif dj == 'label':
v = bf and bf.label or getattr(o, dj, ext[1])
elif getattr(o, dj, ext[1]) is None:
#print "dj:%s field name:%s"%(dj,field_name)
pass
#elif dj == 'input_formats':
#alt_fmts = []
##Strip out the '%' placeholders
#for fmt in getattr(field, dj, ext[1]):
#alt_fmts.append(fmt.replace('%', ''))
#v = u'|'.join(alt_fmts)
elif isinstance(ext[1], basestring):
v = getattr(o, dj, getattr(field, ext[1]))
elif ext[0] == 'store':
v = {
'autoLoad': True,
'storeId': o.name,
'url': '/csds/ext/rdo/queryset/%s/' % (o.name.lower(),),
#'xtype': 'jsonstore',
}
elif dj == 'required':
try:
v = not getattr(o, dj)
except AttributeError :
v = ext[1]
else:
v = getattr(o, dj, ext[1])
if v is not None:
if ext[0] == 'name':
config[ext[0]] = v
config['header'] = v
elif ext[0] not in ('name', 'dataIndex', 'fieldLabel', 'header', 'defaultValue'):
#elif ext[0] in ('allowBlank', 'listWidth', 'store', 'width'):
#if isinstance(v, QuerySetIterator):
# config['editor'][ext[0]] = list(v)
config[ext[0]] = v
if ext[0] == 'store':
#config['url'] = v['url']
choices = [(c[0],c[1]) for c in o.choices]
config['store'] = choices
config['displayField'] = 'display'
config['editable'] = False
#config['editor']['forceSelection'] = True
config['hiddenName'] = o.name
#config['lastQuery'] = ''
config['mode'] = 'local'
config['triggerAction'] = 'all'
#config['valueField'] = 'id'
elif isinstance(v, unicode):
config[ext[0]] = v.encode('utf8')
else:
config[ext[0]] = v
return config
else:
return super(ExtJSONEncoder, self).default(o)
|
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Comments
How to use it from Extjs?
#
Great! Could you better this code adding support for hidden fields and file fields? Thanks!
#
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