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Refactor database migration to handle null values and use direct insertion

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*   Modify the database migration from version 19 to 20 to properly handle null values and use direct data insertion.
*   Create a new table `bookmarks_locations` with `NOT NULL` constraints.
*   Directly insert data into the new table from old database, safely handling `NULL` values by using `DEFAULT` empty string value.
*   Close old database cursor and the database connection.
* Drop the old `bookmarksLocations` table.
This commit is contained in:
Saifuddin 2025-02-23 13:14:16 +05:30
parent 17043a1064
commit b45d4c30ad
1 changed files with 67 additions and 34 deletions
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101
app/src/main/java/fr/free/nrw/commons/di/CommonsApplicationModule.kt
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@ -4,6 +4,7 @@ import android.app.Activity
import android.content.ContentProviderClient
import android.content.ContentResolver
import android.content.Context
import android.database.sqlite.SQLiteDatabase
import android.view.inputmethod.InputMethodManager
import androidx.collection.LruCache
import androidx.room.Room.databaseBuilder
@ -253,45 +254,77 @@ open class CommonsApplicationModule(private val applicationContext: Context) {
private val MIGRATION_19_TO_20 = object : Migration(19, 20) {
override fun migrate(db: SupportSQLiteDatabase) {
// Step 1: Create the new table with NOT NULL constraints
db.execSQL(
"""
CREATE TABLE IF NOT EXISTS bookmarks_locations (
location_name TEXT NOT NULL PRIMARY KEY,
location_language TEXT NOT NULL,
location_description TEXT NOT NULL,
location_lat REAL NOT NULL,
location_long REAL NOT NULL,
location_category TEXT NOT NULL,
location_label_text TEXT NOT NULL,
location_label_icon INTEGER,
location_image_url TEXT NOT NULL,
location_wikipedia_link TEXT NOT NULL,
location_wikidata_link TEXT NOT NULL,
location_commons_link TEXT NOT NULL,
location_pic TEXT NOT NULL,
location_exists INTEGER NOT NULL CHECK(location_exists IN (0, 1))
CREATE TABLE IF NOT EXISTS bookmarks_locations (
location_name TEXT NOT NULL PRIMARY KEY,
location_language TEXT NOT NULL,
location_description TEXT NOT NULL,
location_lat REAL NOT NULL,
location_long REAL NOT NULL,
location_category TEXT NOT NULL,
location_label_text TEXT NOT NULL,
location_label_icon INTEGER,
location_image_url TEXT NOT NULL DEFAULT '',
location_wikipedia_link TEXT NOT NULL,
location_wikidata_link TEXT NOT NULL,
location_commons_link TEXT NOT NULL,
location_pic TEXT NOT NULL,
location_exists INTEGER NOT NULL CHECK(location_exists IN (0, 1))
)
"""
)
// Open old database manually
val oldDbPath = "/data/user/0/fr.free.nrw.commons.beta/databases/commons.db"
val oldDb = SQLiteDatabase.openDatabase(oldDbPath, null, SQLiteDatabase.OPEN_READONLY)
// Fetch data from old table
val cursor = oldDb.rawQuery("SELECT * FROM bookmarksLocations", null)
while (cursor.moveToNext()) {
val locationName = cursor.getString(cursor.getColumnIndexOrThrow("location_name"))
val locationLanguage = cursor.getString(cursor.getColumnIndexOrThrow("location_language"))
val locationDescription = cursor.getString(cursor.getColumnIndexOrThrow("location_description"))
val locationCategory = cursor.getString(cursor.getColumnIndexOrThrow("location_category"))
val locationLabelText = cursor.getString(cursor.getColumnIndexOrThrow("location_label_text"))
val locationLabelIcon = cursor.getInt(cursor.getColumnIndexOrThrow("location_label_icon"))
val locationLat = cursor.getDouble(cursor.getColumnIndexOrThrow("location_lat"))
val locationLong = cursor.getDouble(cursor.getColumnIndexOrThrow("location_long"))
// Handle NULL values safely
val locationImageUrl = cursor.getString(cursor.getColumnIndexOrThrow("location_image_url")) ?: ""
val locationWikipediaLink = cursor.getString(cursor.getColumnIndexOrThrow("location_wikipedia_link")) ?: ""
val locationWikidataLink = cursor.getString(cursor.getColumnIndexOrThrow("location_wikidata_link")) ?: ""
val locationCommonsLink = cursor.getString(cursor.getColumnIndexOrThrow("location_commons_link")) ?: ""
val locationPic = cursor.getString(cursor.getColumnIndexOrThrow("location_pic")) ?: ""
val locationExists = cursor.getInt(cursor.getColumnIndexOrThrow("location_exists"))
// Insert data into new table
db.execSQL(
"""
INSERT INTO bookmarks_locations (
location_name, location_language, location_description, location_category,
location_label_text, location_label_icon, location_lat, location_long,
location_image_url, location_wikipedia_link, location_wikidata_link,
location_commons_link, location_pic, location_exists
) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
""",
arrayOf(
locationName, locationLanguage, locationDescription, locationCategory,
locationLabelText, locationLabelIcon, locationLat, locationLong,
locationImageUrl, locationWikipediaLink, locationWikidataLink,
locationCommonsLink, locationPic, locationExists
)
"""
)
)
}
db.execSQL("ATTACH DATABASE '/data/user/0/fr.free.nrw.commons.beta/databases/commons.db' AS oldDb")
db.execSQL("""
INSERT INTO bookmarks_locations (
location_name, location_language, location_description, location_category,
location_label_text, location_label_icon, location_lat, location_long,
location_image_url, location_wikipedia_link, location_wikidata_link,
location_commons_link, location_pic, location_exists
)
SELECT
location_name, location_language, location_description, location_category,
location_label_text, location_label_icon, location_lat, location_long,
location_image_url, location_wikipedia_link, location_wikidata_link,
location_commons_link, location_pic, location_exists
FROM oldDb.bookmarksLocations
""")
cursor.close()
oldDb.close()
db.execSQL("DROP TABLE IF EXISTS bookmarkLocations")
db.execSQL("DETACH DATABASE oldDb")
// Drop the old table
db.execSQL("DROP TABLE IF EXISTS bookmarksLocations")
}
}
}