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Add ERD to describe how to break out webpages from scrapes #1

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Add ERD to describe how to break out webpages from scrapes #1

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39 changes: 39 additions & 0 deletions server/db/models/visibility.md
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Original file line number Diff line number Diff line change
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# Entities for Visibility


webpages
------
id (uuid) (primary key)
protocol (str)
host (str)
port (str)


scapes
-----
id (uuid) (primary key)
webpage_id (uuid) (foriegn key `webpage.id`)
image (blob)
headers (jsonb)
status_code (int)
created_at (timestamp)


Getting Latest Images

```sql
SELECT
*
FROM
webpages
LEFT JOIN (
SELECT
*
FROM
scrapes
WHERE
scrapes.webpage_id = webpages.id
ORDER BY created_at DESC
LIMIT 1
) as s ON s.webpage_id = webpages.id;
```