github
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https://github.com/simonw/sqlite-utils/issues/402#issuecomment-1035057014 | https://api.github.com/repos/simonw/sqlite-utils/issues/402 | 1035057014 | IC_kwDOCGYnMM49sbd2 | 25778 | 2022-02-10T15:30:28Z | 2022-02-10T15:30:40Z | CONTRIBUTOR | Yeah, the CLI experience is probably where any kind of multi-column, configured setup is going to fall apart. Sticking with GIS examples, one way I might think about this is using the [fiona CLI](https://fiona.readthedocs.io/en/latest/cli.html): ```sh # assuming a database is already created and has SpatiaLite fio cat boundary.shp | sqlite-utils insert boundaries --conversion geometry GeometryGeoJSON - ``` Anyway, very interested to see where you land here. | { "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0 } |
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https://github.com/simonw/sqlite-utils/issues/402#issuecomment-1032732242 | https://api.github.com/repos/simonw/sqlite-utils/issues/402 | 1032732242 | IC_kwDOCGYnMM49jj5S | 25778 | 2022-02-08T15:26:59Z | 2022-02-08T15:26:59Z | CONTRIBUTOR | What if you did something like this: ```python class Conversion: def __init__(self, *args, **kwargs): "Put whatever settings you need here" def python(self, row, column, value): # not sure on args here "Python step to transform value" return value def sql(self, row, column, value): "Return the actual sql that goes in the insert/update step, and maybe params" # value is the return of self.python() return value, [] ``` This way, you're always passing an instance, which has methods that do the conversion. (Or you're passing a SQL string, as you would now.) The `__init__` could take column names, or SRID, or whatever other setup state you need per row, but the row is getting processed with the `python` and `sql` methods (or whatever you want to call them). This is pretty rough, so do what you will with names and args and such. You'd then use it like this: ```python # subclass might be unneeded here, if methods are present class LngLatConversion(Conversion): def __init__(self, x="longitude", y="latitude"): self.x = x self.y = y def python(self, row, column, value): x = row[self.x] y = row[self.y] return x, y def sql(self, row, column, value): # value is now a tuple, returned above s = "GeomFromText(POINT(? ?))" return s, value table.insert_all(rows, conversions={"point": LngLatConversion("lng", "lat"))} ``` I haven't thought through all the implementation details here, and it'll probably break in ways I haven't foreseen, but wanted to get this idea out of my head. Hope it helps. | { "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0 } |
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https://github.com/simonw/sqlite-utils/issues/402#issuecomment-1031791783 | https://api.github.com/repos/simonw/sqlite-utils/issues/402 | 1031791783 | IC_kwDOCGYnMM49f-Sn | 25778 | 2022-02-07T18:37:40Z | 2022-02-07T18:37:40Z | CONTRIBUTOR | I've never used it either, but it's interesting, right? Feel like I should try it for something. I'm trying to get my head around how this conversions feature might work, because I really like the idea of it. | { "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0 } |
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https://github.com/simonw/sqlite-utils/issues/402#issuecomment-1031779460 | https://api.github.com/repos/simonw/sqlite-utils/issues/402 | 1031779460 | IC_kwDOCGYnMM49f7SE | 25778 | 2022-02-07T18:24:56Z | 2022-02-07T18:24:56Z | CONTRIBUTOR | I wonder if there's any overlap with the goals here and the `sqlite3` module's concept of adapters and converters: https://docs.python.org/3/library/sqlite3.html#sqlite-and-python-types I'm not sure that's _exactly_ what we're talking about here, but it might be a parallel with some useful ideas to borrow. | { "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0 } |
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