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BigQuery: add from_string factory methods to Dataset and Table - #5255
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To make it easier to construct Datasets and Tables when the
full-qualified ID is known ahead of time, this PR adds helper methods
called `from_string` to Dataset, DatasetReference, Table, and
TableReference. In each case, the expected format is a fully-qualified
ID (including the project ID) in standard SQL format.
```
dataset = client.create_dataset(
bigquery.Dataset(
client.dataset('mydataset', project='other-project')
)
)
```
becomes
```
dataset = client.create_dataset(
bigquery.Dataset.from_string('other-project.mydataset')
)
```
Also, while writing doctests/examples, I noticed `__repr__` was
inconsistent with the actual constructor on some of these classes, so I
fixed that while I was here so those string representations don't cause
confusion.
Contributor
|
Thanks a lot! |
max-sixty
reviewed
Apr 27, 2018
| 'standard SQL format. e.g. "project.dataset.table", got ' | ||
| '{}'.format(full_table_id)) | ||
|
|
||
| return cls(DatasetReference(parts[0], parts[1]), parts[2]) |
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alixhami
approved these changes
Apr 27, 2018
| standard SQL format. | ||
| """ | ||
| dataset_ref = DatasetReference.from_string(full_dataset_id) | ||
| return cls(dataset_ref) |
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| standard SQL format. | ||
| """ | ||
| table_ref = TableReference.from_string(full_table_id) | ||
| return cls(table_ref) |
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To make it easier to construct Datasets and Tables when the
full-qualified ID is known ahead of time, this PR adds helper methods
called
from_stringto Dataset, DatasetReference, Table, andTableReference. In each case, the expected format is a fully-qualified
ID (including the project ID) in standard SQL format.
becomes
Also, while writing doctests/examples, I noticed
__repr__wasinconsistent with the actual constructor on some of these classes. I
fixed that while I was here so those string representations don't cause
confusion.
/cc @maxim-lian