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Django Admin - Disable the 'Add' action for a specific model

...also register MyAdmin like: admin.site.register(MyModel, MyModelAdmin) Add all into the admin.py of the models`s app folder. – djangonaut Apr 23 '18 at 9:16 ...
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Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]

... There are multiple reasons why the C compiler cannot automatically reorder the fields: The C compiler doesn't know whether the struct represents the memory structure of objects beyond the current compilation unit (for example: a foreign library, a file on disc, network data, CPU page ...
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what is the right way to treat Python argparse.Namespace() as a dictionary?

...store me' >>> args.baz 'store me' Yes, it is okay to access the __dict__ attribute. It is a well-defined, tested, and guaranteed behavior. share | improve this answer | ...
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sqlalchemy unique across multiple columns

... declares those in the table definition, or if using declarative as in the __table_args__: # version1: table definition mytable = Table('mytable', meta, # ... Column('customer_id', Integer, ForeignKey('customers.customer_id')), Column('location_code', Unicode(10)), UniqueConstraint...
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Plotting time in Python with Matplotlib

...erstand why this is the 5th question I've encountered where no one has actually TRIED using a scatter plot - it doesn't work. Type Error - invalid type promotion. – dwanderson Oct 5 '16 at 16:21 ...
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How to get the original value of an attribute in Rails

... Before rails 5.1 Appending _was to your attribute will give you the previous value. For rails 5.1+ Copied from Lucas Andrade's answer below: https://stackoverflow.com/a/50973808/9359123 Appending _was is deprecated in rails 5.1, now you should ap...
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Ideal Ruby project structure

...pname folder because most libraries are in the appname namespace. Additionally, if you try running the command newgem --simple [projectname] that'll quickly generate a scaffold for you with just the bare essentials for a Ruby project (and by extension a Ruby Gem). There are other tools which do thi...
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_DEBUG vs NDEBUG

... +1. NDEBUG in particular is allowed to be #undef'd and #define'd within a single TU (and reincluding <assert.h> changes the assert macro accordingly). Because this is different than expected/desired, it's common to use another macro to control a ...
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In Django, how does one filter a QuerySet with dynamic field lookups?

...a custom ModelField/FormField/WidgetField that implemented the behavior to allow the user to, on the GUI side, basically "build" a query, never seeing the actual text, but using an interface to do so. Sounds like a neat project... – T. Stone Sep 23 '09 at 20:2...
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Disable output buffering

...stdout with some other stream like wrapper which does a flush after every call. class Unbuffered(object): def __init__(self, stream): self.stream = stream def write(self, data): self.stream.write(data) self.stream.flush() def writelines(self, datas): self.stream....