F fix max dropdown options

Summary

Fix for #345 (closed). Send the correct query string in case of BUILD_MAX_EDIT_MODE_DROPDOWN_OPTIONS=-1.

Focus

The original problem was that unlimited dropdown options would result in a P0L-1 query being sent, so this is now caught specifically.

Test Environment

Start LinkAhead with BUILD_MAX_EDIT_MODE_DROPDOWN_OPTIONS=-1 (i.e., default) and enter several hundred records, e.g., by

import linkahead as db
rt = db.RecordType(name="Test").insert()
db.Container().extend([db.Record(name=f"Rec{ii+1}").add_parent(rt) for ii in range(500)]).insert()

then, add Test as a reference prop to any entity and verify that all 500 records can be selected.

As a comparison, repeat for BUILD_MAX_EDIT_MODE_DROPDOWN_OPTIONS=10 and verify that it stops correctly after the first 10 entries and offers the possibility to enter an id manually.

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src/core/js/edit_mode.js

@@ -1893,16 +1893,16 @@ var edit_mode = new function () {
      *     which can be referenced by the property.
      */
     this.retrieve_datatype_list = async function (datatype) {
-        var find_entity = ["FILE", "REFERENCE"].includes(datatype) ? "" : `"${datatype}"`;
+        const find_entity = ["FILE", "REFERENCE"].includes(datatype) ? "" : `"${datatype}"`;
         const max_options = parseInt("${BUILD_MAX_EDIT_MODE_DROPDOWN_OPTIONS}"); //for each query; there might be more candidates in total
 
-        var query_suffix = max_options != -1 ? `&P=0L${max_options}` : "";
+        const query_suffix = max_options != -1 ? `&P=0L${max_options}` : "";
         if (max_options != -1) {
             var n_entities = datatype !== "FILE" ? await edit_mode.query(`COUNT Record ${find_entity}`, true) : 0;
             var n_files = await edit_mode.query(`COUNT File ${find_entity}`, true);
         }
-        var entities = datatype !== "FILE" ? edit_mode.query(`FIND Record ${find_entity}${query_suffix}`, true) : [];
-        var files = edit_mode.query(`FIND File ${find_entity}${query_suffix}`, true);
+        const entities = datatype !== "FILE" ? edit_mode.query(`FIND Record ${find_entity}${query_suffix}`, true) : [];
+        const files = edit_mode.query(`FIND File ${find_entity}${query_suffix}`, true);
 
         await Promise.all([entities, files])