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fixed schema doc #102

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Ivar 2016-09-07 14:22:25 +02:00
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commit 3da5b89a6d
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docs/schema.md
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@ -40,32 +40,4 @@ Used by db-migrate module to keep track of migrations.
| enabled | int4 | 10 | 1 | 0 | |
| description | text | 2147483647 | 1 | (null) | |
| archived | int4 | 10 | 1 | 0 | |
| parameters | json | 2147483647 | 1 | (null) | deprecated (*) |
| strategy_name | varchar | 255 | 1 | (null) | deprecated (*) |
| strategies | json | 2147483647 | 1 | (null) | |
(*) we migrated from `parmaters` and `strategy_name` to `strategies` which should contain an array of these.
For [aggregate strategies](https://github.com/finn-no/unleash/issues/102) we had the following sql to migrate to the strategies column:
```sql
ALTER TABLE features ADD "strategies" json;
--populate the strategies column
UPDATE features
SET strategies = ('[{"name":"'||f.strategy_name||'","parameters":'||f.parameters||'}]')::json
FROM features as f
WHERE f.name = features.name;
```
In order to migrate back, one can use the following sql (it will loose all, but the first activation strategy):
```sql
UPDATE features
SET strategy_name = f.strategies->0->>'name',
parameters = f.strategies->0->'parameters'
FROM features as f
WHERE f.name = features.name;
ALTER TABLE features DROP COLUMN "strategies";
```