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66 lines
1.9 KiB
V
66 lines
1.9 KiB
V
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module main
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// This example demonstrates how to use `v watch` for vweb apps, that use sqlite .db files.
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//
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// Note 1: while developing services, it is useful to also add the `--keep` option of `v watch`,
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// which will restart the app right away, even when it exits on its own.
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//
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// Note 2: vweb supports a special live reload mode, where it will make the browser to check for server
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// restarts, and it will trigger a refresh of the current page, right after that is detected.
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//
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// The above means, that to get the most optimal prototyping experience for vweb apps, use:
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// `v -d vweb_livereload watch --only-watch=*.v,*.html,*.css,*.js --keep run .`
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import os
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import vweb
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import db.sqlite
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fn mydb() !sqlite.DB {
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return sqlite.connect(os.resource_abs_path('app.db'))
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}
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struct State {
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mut:
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counter int
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}
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struct App {
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vweb.Context
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mut:
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state shared State
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}
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pub fn (mut app App) index() vweb.Result {
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mut c := 0
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lock app.state {
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app.state.counter++
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c = app.state.counter
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}
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visits := app.update_db() or { 0 }
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return app.html('<!doctype html><html><body>
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<br/>Current request counter, after the server restart: ${c}.
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<br/>Total stored visits: ${visits}
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</body></html>')
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}
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fn (mut app App) update_db() !int {
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mut db := mydb()!
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db.exec('INSERT INTO visits (created_at) VALUES ("")')
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visits := db.q_int('SELECT count(*) FROM visits')
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db.close()!
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return visits
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}
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fn main() {
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println('App demonstrating the use of `vweb` & `db.sqlite` together.')
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println('For best prototyping experience, run with:')
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println('`v -d vweb_livereload watch --keep run examples/vwatch/web_server/`')
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println('')
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mut db := mydb()!
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db.exec('CREATE TABLE visits (id integer primary key AUTOINCREMENT, created_at timestamp default current_timestamp);')
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db.exec('CREATE TRIGGER INSERT_visits AFTER INSERT ON visits BEGIN
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UPDATE visits SET created_at = datetime("now", "localtime") WHERE rowid = new.rowid ;
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END')
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db.close()!
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vweb.run(&App{}, 19123)
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}
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