Molodetz blogrol volgens DPP-template

molodetz/database/pagination.py

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+# retoor <retoor@molodetz.nl>
+import math
+
+from molodetz.database.core import db
+
+
+def paginate(table_name, before=None, order="desc", cursor_field="created_at", limit=25, **filters):
+    if table_name not in db.tables:
+        return [], None
+    table = db[table_name]
+    criteria = dict(filters)
+    if "deleted_at" not in criteria:
+        criteria["deleted_at"] = None
+    if before:
+        criteria[cursor_field] = {"<": before} if order == "desc" else {">": before}
+    order_by = [f"-{cursor_field}"] if order == "desc" else [cursor_field]
+    rows = list(table.find(_limit=limit + 1, order_by=order_by, **criteria))
+    next_cursor = None
+    if len(rows) > limit:
+        rows = rows[:limit]
+        next_cursor = rows[-1][cursor_field]
+    return rows, next_cursor
+
+
+def build_pagination(page, total, per_page):
+    pages = max(1, math.ceil(total / per_page)) if per_page else 1
+    page = min(max(1, page), pages)
+    return {
+        "page": page,
+        "pages": pages,
+        "total": total,
+        "per_page": per_page,
+        "offset": (page - 1) * per_page,
+        "has_prev": page > 1,
+        "has_next": page < pages,
+    }