fixes in OneToManyAndroidRepo and adding of CursorIterator

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## 0.9.20
 
+* `Repos`:
+    * `Common`:
+        * Fixes in `OneToManyAndroidRepo`
+        * New `CursorIterator`
+
 ## 0.9.19
 
 * `Versions`:

repos/common/src/main/kotlin/dev/inmo/micro_utils/repos/CursorIterator.kt

@@ -0,0 +1,27 @@
+package dev.inmo.micro_utils.repos
+
+import android.database.Cursor
+
+class CursorIterator(
+    private val c: Cursor
+) : Iterator<Cursor> {
+    private var i = 0
+
+    init {
+        c.moveToFirst()
+    }
+    override fun hasNext(): Boolean {
+        return i < c.count
+    }
+
+    override fun next(): Cursor {
+        i++
+        return if (c.moveToNext()) {
+            c
+        } else {
+            throw NoSuchElementException()
+        }
+    }
+}
+
+operator fun Cursor.iterator(): CursorIterator = CursorIterator(this)

repos/common/src/main/kotlin/dev/inmo/micro_utils/repos/onetomany/OneToManyAndroidRepo.kt

@@ -143,7 +143,13 @@ class OneToManyAndroidRepo<Key, Value>(
     }.toLong()
 
     override suspend fun count(k: Key): Long = helper.blockingReadableTransaction {
-        selectDistinct(tableName, columns = valueColumnArray, selection = "$idColumnName=?", selectionArgs = arrayOf(k.keyAsString()), limit = FirstPagePagination(1).limitClause()).use {
+        select(
+            tableName,
+            columns = valueColumnArray,
+            selection = "$idColumnName=?",
+            selectionArgs = arrayOf(k.keyAsString()),
+            limit = FirstPagePagination(1).limitClause()
+        ).use {
             it.count
         }
     }.toLong()