[web2py] grid create,editable, deletable are not displayed

[Omi Chiba]

I don't what I'm doing wrong. I made a new sample grid app with ver 2.1.1 
and it doesn't display create, editable, deletable by default or with True.

Model
db.define_table('Category',
    Field('Code', 'integer'),
    Field('Name'),
    format='%(Name)s')

Controller
def index():
    query = db.Category.id >0
    grid = SQLFORM.grid(query,csv=True,paginate=10)
    return dict(grid=grid)

View
{{extend 'layout.html'}}
{{=grid}}




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