Don't let users buy more than one product of the same type in commerce
109742
limit order quantity in drupal commerce
133813
Are duplicate chains OK, or just close directly against one canonical?
87476
How to limit charging to a user defined limit?
111073
Preventing multiple objects from being printed
102288
Deny items to be removed from inventory slots.
157379
Is there any limit to the number of PPA's I can add to the system? Why?
45965
Should the user be forced to sign in for a wish list on an ecommerce site?
108573
Limit the creation of tags
62526
How to disable multiarch support?
27006
How to remove the "For Purchase" section from the Software Center?
65441
Prevent the next x damage and multiple unblocked creatures
155967
warning about too many open figures
91503
Displaying multiple items at same address using Carto?
56949
Want to prevent a user to access other user cases
151070
Is it possible to control a value in all of my materials with one click?
1598
What's the policy about having multiple user accounts?
24029
Ways to circumvent the same-origin policy