a8c1b2a463
In case of multiple renames, all of the resulting relations will point to the same data, so writing on one and marking its only known copy as writable would be incorrect. For this to work, all the references should be kown to all the other instances. It is probably not worth to implement it. Implemented test for the update
17 lines
404 B
Python
17 lines
404 B
Python
p1=people
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p2=p1.rename({'id':'i'})
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p2=p2.rename({'i':'id'})
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assert p1==p2
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assert p1._readonly
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assert p2._readonly
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# It is VERY important to not change the original relations
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# or other tests might fail randomly, since the relations are
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# only loaded once
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p2.update('age==20', {'age':50})
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assert p2._readonly == False
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assert p1!=p2
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p3 = p2.selection('age!=50')
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p4 = p1.selection('age!=20')
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assert p3==p4
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