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Fix tagged posts SQLite query

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SQLite doesn't have an `RLIKE` function, so the query for hashtagged
posts was failing before. This adds a `regexp` function to SQLite and
correctly retrieves all posts on a blog with the requested hashtag.

This closes #55
This commit is contained in:
Matt Baer 2019-01-07 11:55:23 -05:00
parent 1c58c64c7c
commit 8a555567a6
3 changed files with 20 additions and 2 deletions
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2
app.go
View file

@ -483,7 +483,7 @@ func connectToDatabase(app *app) {
log.Error("SQLite database filename value in config.ini is empty.")
os.Exit(1)
}
db, err = sql.Open("sqlite3", app.cfg.Database.FileName+"?parseTime=true&cached=shared")
db, err = sql.Open("sqlite3_with_regex", app.cfg.Database.FileName+"?parseTime=true&cached=shared")
db.SetMaxOpenConns(1)
} else {
log.Error("Invalid database type '%s'. Only 'mysql' and 'sqlite3' are supported right now.", app.cfg.Database.Type)

11
database-sqlite.go
View file

@ -13,13 +13,24 @@
package writefreely
import (
"database/sql"
"github.com/go-sql-driver/mysql"
"github.com/mattn/go-sqlite3"
"github.com/writeas/web-core/log"
"regexp"
)
func init() {
SQLiteEnabled = true
regex := func(re, s string) (bool, error) {
return regexp.MatchString(re, s)
}
sql.Register("sqlite3_with_regex", &sqlite3.SQLiteDriver{
ConnectHook: func(conn *sqlite3.SQLiteConn) error {
return conn.RegisterFunc("regexp", regex, true)
},
})
}
func (db *datastore) isDuplicateKeyErr(err error) bool {

9
database.go
View file

@ -1139,7 +1139,14 @@ func (db *datastore) GetPostsTagged(c *Collection, tag string, page int, include
if !includeFuture {
timeCondition = "AND created <= " + db.now()
}
rows, err := db.Query("SELECT "+postCols+" FROM posts WHERE collection_id = ? AND LOWER(content) RLIKE ? "+timeCondition+" ORDER BY created "+order+limitStr, collID, "#"+strings.ToLower(tag)+"[[:>:]]")
var rows *sql.Rows
var err error
if db.driverName == driverSQLite {
rows, err = db.Query("SELECT "+postCols+" FROM posts WHERE collection_id = ? AND LOWER(content) regexp ? "+timeCondition+" ORDER BY created "+order+limitStr, collID, `.*#`+strings.ToLower(tag)+`\b.*`)
} else {
rows, err = db.Query("SELECT "+postCols+" FROM posts WHERE collection_id = ? AND LOWER(content) RLIKE ? "+timeCondition+" ORDER BY created "+order+limitStr, collID, "#"+strings.ToLower(tag)+"[[:>:]]")
}
if err != nil {
log.Error("Failed selecting from posts: %v", err)
return nil, impart.HTTPError{http.StatusInternalServerError, "Couldn't retrieve collection posts."}