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https://github.com/dogsheep/dogsheep-beta
Build a search index across content from multiple SQLite database tables and run faceted searches against it using Datasette
https://github.com/dogsheep/dogsheep-beta
datasette datasette-io datasette-plugin datasette-tool dogsheep search
Last synced: 9 days ago
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Build a search index across content from multiple SQLite database tables and run faceted searches against it using Datasette
- Host: GitHub
- URL: https://github.com/dogsheep/dogsheep-beta
- Owner: dogsheep
- Created: 2019-07-17T17:07:26.000Z (over 5 years ago)
- Default Branch: main
- Last Pushed: 2021-09-03T17:47:45.000Z (about 3 years ago)
- Last Synced: 2024-10-25T09:46:42.679Z (15 days ago)
- Topics: datasette, datasette-io, datasette-plugin, datasette-tool, dogsheep, search
- Language: Python
- Homepage: https://dogsheep.github.io/
- Size: 59.6 KB
- Stars: 185
- Watchers: 10
- Forks: 6
- Open Issues: 15
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
- awesome-starred - dogsheep/dogsheep-beta - Build a search index across content from multiple SQLite database tables and run faceted searches against it using Datasette (others)
- project-awesome - dogsheep/dogsheep-beta - Build a search index across content from multiple SQLite database tables and run faceted searches against it using Datasette (Python)
README
# dogsheep-beta
[](https://pypi.org/project/dogsheep-beta/)
[](https://github.com/dogsheep/beta/releases)
[](https://github.com/dogsheep/beta/actions?query=workflow%3ATest)
[](https://github.com/dogsheep/beta/blob/main/LICENSE)
Build a search index across content from multiple SQLite database tables and run faceted searches against it using Datasette
## Example
A live example of this plugin is running at https://datasette.io/-/beta - configured using [this YAML file](https://github.com/simonw/datasette.io/blob/main/templates/dogsheep-beta.yml).
Read more about how this example works in [Building a search engine for datasette.io](https://simonwillison.net/2020/Dec/19/dogsheep-beta/).
## Installation
Install this tool like so:
$ pip install dogsheep-beta
## Usage
Run the indexer using the `dogsheep-beta` command-line tool:
$ dogsheep-beta index dogsheep.db config.yml
The `config.yml` file contains details of the databases and document types that should be indexed:
```yaml
twitter.db:
tweets:
sql: |-
select
tweets.id as key,
'Tweet by @' || users.screen_name as title,
tweets.created_at as timestamp,
tweets.full_text as search_1
from tweets join users on tweets.user = users.id
users:
sql: |-
select
id as key,
name || ' @' || screen_name as title,
created_at as timestamp,
description as search_1
from users
```
This will create a `search_index` table in the `dogsheep.db` database populated by data from those SQL queries.
By default the search index that this tool creates will be configured for Porter stemming. This means that searches for words like `run` will match documents containing `runs` or `running`.
If you don't want to use Porter stemming, use the `--tokenize none` option:
$ dogsheep-beta index dogsheep.db config.yml --tokenize none
You can pass other SQLite tokenize argumenst here, see [the SQLite FTS tokenizers documentation](https://www.sqlite.org/fts5.html#tokenizers).
## Columns
The columns that can be returned by our query are:
- `key` - a unique (within that type) primary key
- `title` - the title for the item
- `timestamp` - an ISO8601 timestamp, e.g. `2020-09-02T21:00:21`
- `search_1` - a larger chunk of text to be included in the search index
- `category` - an integer category ID, see below
- `is_public` - an integer (0 or 1, defaults to 0 if not set) specifying if this is public or not
Public records are things like your public tweets, blog posts and GitHub commits.
## Categories
Indexed items can be assigned a category. Categories are integers that correspond to records in the `categories` table, which defaults to containing the following:
| id | name |
|------|------------|
| 1 | created |
| 2 | saved |
| 3 | received |
`created` is for items that have been created by the Dogsheep instance owner.
`saved` is for items that they have saved, liked or favourited.
`received` is for items that have been specifically sent to them by other people - incoming emails or direct messages for example.
## Datasette plugin
Run `datasette install dogsheep-beta` (or use `pip install dogsheep-beta` in the same environment as Datasette) to install the Dogsheep Beta Datasette plugin.
Once installed, a custom search interface will be made available at `/-/beta`. You can use this interface to execute searches.
The Datasette plugin has some configuration options. You can set these by adding the following to your `metadata.json` configuration file:
```json
{
"plugins": {
"dogsheep-beta": {
"database": "beta",
"config_file": "dogsheep-beta.yml",
"template_debug": true
}
}
}
```
The configuration settings for the plugin are:
- `database` - the database file that contains your search index. If the file is `beta.db` you should set `database` to `beta`.
- `config_file` - the YAML file containing your Dogsheep Beta configuration.
- `template_debug` - set this to `true` to enable debugging output if errors occur in your custom templates, see below.
## Custom results display
Each indexed item type can define custom display HTML as part of the `config.yml` file. It can do this using a `display` key containing a fragment of Jinja template, and optionally a `display_sql` key with extra SQL to execute to fetch the data to display.
Here's how to define a custom display template for a tweet:
```yaml
twitter.db:
tweets:
sql: |-
select
tweets.id as key,
'Tweet by @' || users.screen_name as title,
tweets.created_at as timestamp,
tweets.full_text as search_1
from tweets join users on tweets.user = users.id
display: |-
{{ title }} - tweeted at {{ timestamp }}
{{ search_1 }}
```
This example reuses the value that were stored in the `search_index` table when the indexing query was run.
To load in extra values to display in the template, use a `display_sql` query like this:
```yaml
twitter.db:
tweets:
sql: |-
select
tweets.id as key,
'Tweet by @' || users.screen_name as title,
tweets.created_at as timestamp,
tweets.full_text as search_1
from tweets join users on tweets.user = users.id
display_sql: |-
select
users.screen_name,
tweets.full_text,
tweets.created_at
from
tweets join users on tweets.user = users.id
where
tweets.id = :key
display: |-
{{ display.screen_name }} - tweeted at {{ display.created_at }}
{{ display.full_text }}
```
The `display_sql` query will be executed for every search result, passing the key value from the `search_index` table as the `:key` parameter and the user's search term as the `:q` parameter.
This performs well because [many small queries are efficient in SQLite](https://www.sqlite.org/np1queryprob.html).
If an error occurs while rendering one of your templates the search results page will return a 500 error. You can use the `template_debug` configuration setting described above to instead output debugging information for the search results item that experienced the error.
## Displaying maps
This plugin will eventually include a number of useful shortcuts for rendering interesting content.
The first available shortcut is for displaying maps. Make your custom content output something like this:
```html
```
JavaScript on the page will look for any elements with `data-map-latitude` and `data-map-longitude` and, if it finds any, will load Leaflet and convert those elements into maps centered on that location. The default zoom level will be 12, or you can set a `data-map-zoom` attribute to customize this.
## Development
To set up this plugin locally, first checkout the code. Then create a new virtual environment:
cd dogsheep-beta
python3 -mvenv venv
source venv/bin/activate
Or if you are using `pipenv`:
pipenv shell
Now install the dependencies and tests:
pip install -e '.[test]'
To run the tests:
pytest