added tagcloud

applications/examples/controllers/database_examples.py

@@ -0,0 +1,152 @@
+from gluon.fileutils import read_file
+
+response.menu = [['Register User', False, URL(r=request,
+                 f='register_user')], ['Register Dog', False,
+                 URL('register_dog')], ['Register Product'
+                 , False, URL('register_product')],
+                 ['Buy product', False, URL('buy')]]
+
+
+def register_user():
+    """ simple user registration form with validation and database.insert()
+        also lists all records currently in the table"""
+
+    # ## create an insert form from the table
+
+    form = SQLFORM(db.users)
+
+    # ## if form correct perform the insert
+
+    if form.accepts(request.vars, session):
+        response.flash = 'new record inserted'
+
+    # ## and get a list of all users
+
+    records = SQLTABLE(db().select(db.users.ALL))
+    return dict(form=form, records=records)
+
+
+def register_dog():
+    """ simple user registration form with validation and database.insert()
+        also lists all records currently in the table"""
+
+    form = SQLFORM(db.dogs)
+    if form.accepts(request.vars, session):
+        response.flash = 'new record inserted'
+    download = URL('download')  # to see the picture
+    records = SQLTABLE(db().select(db.dogs.ALL), upload=download)
+    return dict(form=form, records=records)
+
+
+def register_product():
+    """ simple user registration form with validation and database.insert()
+        also lists all records currently in the table"""
+
+    form = SQLFORM(db.products)
+    if form.accepts(request.vars, session):
+        response.flash = 'new record inserted'
+    records = SQLTABLE(db().select(db.products.ALL))
+    return dict(form=form, records=records)
+
+
+def buy():
+    """ uses a form to query who is buying what. validates form and
+        updates existing record or inserts new record in purchases """
+
+    buyerRecords = db().select(db.users.ALL)
+    buyerOptions = []
+    for row in buyerRecords:
+        buyerOptions.append(OPTION(row.name, _value=row.id))
+
+    productRecords = db().select(db.products.ALL)
+    productOptions = []
+    for row in productRecords:
+        productOptions.append(OPTION(row.name, _value=row.id))
+
+    form = FORM(TABLE(
+                TR('Buyer id:',
+                    SELECT(buyerOptions,_name='buyer_id')),
+                TR('Product id:',
+                    SELECT(productOptions,_name='product_id')),
+                TR('Quantity:',
+                    INPUT(_type='text', _name='quantity',
+                          requires=IS_INT_IN_RANGE(1, 100))),
+                TR('',
+                    INPUT(_type='submit', _value='Order'))
+                ))
+    if form.accepts(request.vars, session, keepvalues=True):
+
+        # ## check if user is in the database
+
+        if len(db(db.users.id == form.vars.buyer_id).select()) == 0:
+            form.errors.buyer_id = 'buyer not in database'
+
+        # ## check if product is the database
+
+        if len(db(db.products.id == form.vars.product_id).select())\
+             == 0:
+            form.errors.product_id = 'product not in database'
+
+        # ## if no errors
+
+        if len(form.errors) == 0:
+
+            # ## get a list of same purchases by same user
+
+            purchases = db((db.purchases.buyer_id == form.vars.buyer_id)
+                            & (db.purchases.product_id
+                            == form.vars.product_id)).select()
+
+            # ## if list contains a record, update that record
+
+            if len(purchases) > 0:
+                purchases[0].update_record(quantity=purchases[0].quantity
+                         + form.vars.quantity)
+            else:
+
+            # ## or insert a new record in table
+                db.purchases.insert(buyer_id=form.vars.buyer_id,
+                                    product_id=form.vars.product_id,
+                                    quantity=form.vars.quantity)
+            response.flash = 'product purchased!'
+    if len(form.errors):
+        response.flash = 'invalid values in form!'
+
+    # ## now get a list of all purchases
+
+    # quick fix to make it runnable on gae
+    if purchased:
+        records = db(purchased).select(db.users.name,
+                                       db.purchases.quantity,
+                                       db.products.name)
+    else:
+        records = db().select(db.purchases.ALL)
+    return dict(form=form, records=SQLTABLE(records), vars=form.vars,
+                vars2=request.vars)
+
+
+def delete_purchased():
+    """ delete all records in purchases """
+
+    db(db.purchases.id > 0).delete()
+    redirect(URL('buy'))
+
+
+def reset_purchased():
+    """ set quantity=0 for all records in purchases """
+
+    db(db.purchases.id > 0).update(quantity=0)
+    redirect(URL('buy'))
+
+
+def download():
+    """ used to download uploaded files """
+
+    import gluon.contenttype
+    app = request.application
+    filename = request.args[0]
+    response.headers['Content-Type'] = \
+        gluon.contenttype.contenttype(filename)
+    return read_file('applications/%s/uploads/%s' % (app, filename), 'rb')
+
+