119 lines
2.1 KiB
Markdown
119 lines
2.1 KiB
Markdown
---
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title: "Recfiles Extended Example"
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tags: [ "data", "database", "recfiles" ]
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---
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## Create
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Make a database for your boardgames, specifying only one field and value:
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```bash
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database=games.rec
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n=Name
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g=Vojvodina
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touch $database
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recins -f $n --value $g $database
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recsel $database
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```
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Insert a few more, with the estimated playtime:
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```bash
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recins -f Name -v Saboter -f Playtime -v 30 $database
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recins -f Name -v Chess -f Playtime -v 30 $database
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```
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View all games, or select one by number:
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```bash
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recsel $database
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recsel -n 0 $database
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```
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Each game should note whether or not you have played it yet, so you can add that field and set the default to `yes`.
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```bash
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f=played
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v=yes
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recset -f $f -a $v $database
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```
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...but the field is wrong, it should have a capital letter:
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```bash
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new_field=Played
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recset -f $f --rename $new_field
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```
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## Read
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Check how many records the database has:
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```bash
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recinf $database
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```
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Look at just the games you've never played:
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```bash
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recsel --expression="Played = 'no'" $database
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```
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Print how many, then just print the names:
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```bash
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recsel -e "Played = 'no'" --count $database
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recsel -e "Played = 'no'" --print=Name $database
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```
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## Update
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To change a game's `Played` field from `no` to `yes`, use `recset` to specify the number, and change that field.
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```bash
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num=0
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f=Played
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value=yes
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recsel --number=$num $database
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recset --number=$num -f $f --set=$value $database
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```
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Find all games with a playtime of `30`, and set the field `Max_Players` to `4`.
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```bash
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recset -e "Playtime = 40" -f Max_Players --set 50 games.rec
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```
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This doesn't work, because that field does not exist.
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You can `--set-add` the field, to add it wherever it does not exist.
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```bash
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recset -e "Playtime = 40" -f Max_Players --set-add 50 games.rec
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```
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## Delete
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Remove `Played` record from first game:
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```bash
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num=0
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recset --number=$num -f Played --delete $database
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```
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You can comment the line instead of deleting it:
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```bash
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num=1
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recset --number=$num -f Played --delete $database
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recsel $database
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cat $database
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```
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Delete an entire record:
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```bash
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num=2
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recdel --number=$num $database
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```
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