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Update common-parameters.md

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add also fk sample
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collerek
2021-08-17 11:40:31 +02:00
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docs/fields/common-parameters.md
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@ -104,18 +104,28 @@ Sample usage:
## name ## name
`name`: `Any` = `None` -> Defaults to None `name`: `str` = `None` -> defaults to None
Allows you to specify a column name alias to be used. Useful for existing database structures that use a reserved keyword. Allows you to specify a column name alias to be used.
Take for example the snippet below. `from`, being a reserved word in python, will prevent you from creating a model with that column name. Changing the model name Useful for existing database structures that use a reserved keyword, or if you would like to use database name that is different from `ormar` field name.
to `from_` and adding the parameter `name='from'` will cause ormar to use `from` for the database column name. Take for example the snippet below.
``` `from`, being a reserved word in python, will prevent you from creating a model with that column name.
...
Changing the model name to `from_` and adding the parameter `name='from'` will cause ormar to use `from` for the database column name.
```python
#... rest of Model cut for brevity
from_: str = ormar.String(max_length=15, name='from') from_: str = ormar.String(max_length=15, name='from')
... ```
Similarly, you can change the foreign key column names in database, while keeping the desired relation name in ormar:
```python
# ... rest of Model cut for brevity
album: Optional[Album] = ormar.ForeignKey(Album, name="album_id")
``` ```
## index ## index