Fix bad href substitution on pagination usage

CHANGES.md

@@ -9,6 +9,10 @@ As a part of this release, this repository was extracted from the main
 
 * Default branch to **main** ([#544](https://github.com/stac-utils/stac-fastapi/pull/544))
 
+### Fixed
+
+* Fix bad links generated by search for pagination ([#14](https://github.com/stac-utils/stac-fastapi-sqlalchemy/pull/14/files))
+
 ## [2.4.4] - 2023-03-09
 
 ### Added

stac_fastapi/sqlalchemy/core.py

@@ -310,7 +310,7 @@ def get_search(
                 if link["body"] and link["merge"]:
                     query_params.update(link["body"])
                 link["method"] = "GET"
-                link["href"] = f"{link['body']}?{urlencode(query_params)}"
+                link["href"] = f"{link['href']}?{urlencode(query_params)}"
                 link["body"] = None
                 link["merge"] = False
                 page_links.append(link)
@@ -422,9 +422,9 @@ def post_search(
 
                 # Query fields
                 if search_request.query:
-                    for (field_name, expr) in search_request.query.items():
+                    for field_name, expr in search_request.query.items():
                         field = self.item_table.get_field(field_name)
-                        for (op, value) in expr.items():
+                        for op, value in expr.items():
                             if op == Operator.gte:
                                 query = query.filter(operator.ge(field, value))
                             elif op == Operator.lte:

tests/resources/test_item.py

@@ -685,6 +685,34 @@ def test_item_search_get_query_extension(app_client, load_test_data):
     )
 
 
+def test_item_search_pagination(app_client, load_test_data):
+    """Test format of pagination links on a GET search"""
+    test_item = load_test_data("test_item.json")
+    for x in range(20):
+        test_item["id"] = f"test_item_{x}"
+        resp = app_client.post(
+            f"/collections/{test_item['collection']}/items", json=test_item
+        )
+        assert resp.status_code == 200
+
+    params = {"limit": 5}
+    resp = app_client.get("/search", params=params)
+    assert resp.status_code == 200
+
+    resp_json = resp.json()
+    links = resp_json["links"]
+    next_link = next(link for link in links if link["rel"] == "next")
+    assert next_link["href"].startswith("http://testserver/search?")
+
+    resp = app_client.get(links[0]["href"])
+    resp_json = resp.json()
+    links = resp_json["links"]
+    next_link = next(link for link in links if link["rel"] == "next")
+    prev_link = next(link for link in links if link["rel"] == "previous")
+    assert next_link["href"].startswith("http://testserver/search?")
+    assert prev_link["href"].startswith("http://testserver/search?")
+
+
 def test_get_missing_item_collection(app_client):
     """Test reading a collection which does not exist"""
     resp = app_client.get("/collections/invalid-collection/items")