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How do I migrate a model out of one django app and into a new one?
...ons
| | |-- 0001_initial.py
| | |-- 0002_create_cat.py
| | `-- 0003_drop_cat.py
| `-- models.py
`-- specific
|-- migrations
| |-- 0001_initial.py
| |-- 0002_create_dog.py
| `-- 0003_create_cat.py
`-- models.py
Now we need to edit both migration files:
#0003...
Batch File; List files in directory, only filenames?
...echo off
for /f tokens^=* %%i in ('where .:*')do %%~nxi
Output:
file_0003.xlsx
file_0001.txt
file_0002.log
where .:*
Output:
G:\SO_en-EN\Q23228983\file_0003.xlsx
G:\SO_en-EN\Q23228983\file_0001.txt
G:\SO_en-EN\Q23228983\file_0002.log
For recursively:
where /r . *
Output:
G:\SO_en-EN\...
Backwards migration with Django South
...
0000_initial.py
0001_added_some_fields.py
0002_added_some_more_fields.py
0003_deleted_some_stuff.py
Normally, when you run ./manage.py migrate your_app, South runs all new migrations, in order. (It looks at the database tables to decide which ones are 'new').
However, you can also specify any m...
What are the most common non-BMP Unicode characters in actual use? [closed]
...Sm MINUS SIGN
602377 U+002003 ‹ › GC=Zs EM SPACE
528576 U+0003BC ‹μ› GC=Ll GREEK SMALL LETTER MU
519669 U+0003B2 ‹β› GC=Ll GREEK SMALL LETTER BETA
512312 U+0003B1 ‹α› GC=Ll GREEK SMALL LETTER ALPHA
491842 U+00200A ‹ › GC=Zs HAIR SPACE
462...
Histogram using gnuplot?
...t(x)=(x-int(x)>0.9999)?int(x)+1:int(x)
This function will give rint(0.0003/0.0001)=3, while int(0.0003/0.0001)=floor(0.0003/0.0001)=2.
Why? Please look at Perl int function and padding zeros
share
|
...
C# operator overload for `+=`?
...ode for this instructions:
IL_0000: nop
IL_0001: ldc.i4.s 10
IL_0003: newobj instance void [mscorlib]System.Decimal::.ctor(int32)
IL_0008: stloc.0
IL_0009: ldloc.0
IL_000a: ldc.i4.s 10
IL_000c: newobj instance void [mscorlib]System.Decimal::.ctor(int32)
IL_0011: ...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
... @sleske: Using decimal for human-readability, if an energy meter reads 0003 and the previous reading was 9995, does that mean that -9992 units of energy were used, or that 0008 units of energy were used? Having 0003-9995 yield 0008 makes it easy to calculate the latter result. Having it yield ...
nodejs how to read keystrokes from stdin
...on( 'data', function( key ){
// ctrl-c ( end of text )
if ( key === '\u0003' ) {
process.exit();
}
// write the key to stdout all normal like
process.stdout.write( key );
});
pretty simple - basically just like process.stdin's documentation but using setRawMode( true ) to get a raw s...
MYSQL Truncated incorrect DOUBLE value
...or presents itself.
SQL Error (1292): Truncated incorrect DOUBLE value: 'N0003'
Test data
CREATE TABLE `table1 ` (
`value1` VARCHAR(50) NOT NULL
);
INSERT INTO table1 (value1) VALUES ('N0003');
CREATE TABLE `table2 ` (
`value2` VARCHAR(50) NOT NULL
);
INSERT INTO table2 (value2)
SELE...
Does using “new” on a struct allocate it on the heap or stack?
...mscorlib]System.Guid guid)
L_0001: ldloca.s guid
L_0003: ldstr ""
L_0008: call instance void [mscorlib]System.Guid::.ctor(string)
// Removed ToString() call
L_001c: ret
}
.method private hidebysig static void ParameterisedCtorCallMetho...