'url': '/web/binary/download_document?model=wizard.product.stock.report&field=datas&id=%s&filename=product_stock.xls'%(self.id),
}
例中的url包含model及field、id、filename等信息，下一步将在controller方法中抓取到url
2. 创建controller类，捕获url，并下载文件
from openerp import http
from openerp.http import request
from openerp.addons.web.controllers.main import serialize_exception,content_disposition
import base64
class Binary(http.Controller):
@http.route('/web/binary/download_document', type='http', auth="public")
@serialize_exception
def download_document(self,model,field,id,filename=None, **kw):
""" Download link for files stored as binary fields.
:param str model: name of the model to fetch the binary from
:param str field: binary field
:param str id: id of the record from which to fetch the binary
:param str filename: field holding the file's name, if any
:returns: :class:`werkzeug.wrappers.Response`
"""
Model = request.registry[model]
cr, uid, context = request.cr, request.uid, request.context
fields = [field]
res = Model.read(cr, uid, [int(id)], fields, context)[0]
filecontent = base64.b64decode(res.get(field) or '')
if not filecontent:
return request.not_found()
else:
if not filename:
filename = '%s_%s' % (model.replace('.', '_'), id)
return request.make_response(filecontent,
[('Content-Type', 'application/octet-stream'),
('Content-Disposition', content_disposition(filename))])
在上面的方法中从url中拿到ID并返回http响应。
例子中下载的是Excel文件，你可以返回任意类型的文件，甚至是数据库中的二进制字段。
