fix pager.total value for multiple context

server/lib/db/index.js

@@ -314,8 +314,19 @@ class DatabaseConnector {
       rows = await this.exec(query, queryParameters);
     } else {
       // paginated data
-      const paginationLimits = filters.paginationLimitQuery(tables, params.limit, params.page);
-      [pager] = await this.exec(paginationLimits, queryParameters);
+
+      // FIXME: Performance issue, use SQL COUNT in a better way
+      const total = (await this.exec(filters.getAllResultQuery(sql.concat(' ', tables)), queryParameters)).length;
+      const page = params.page ? parseInt(params.page, 10) : 1;
+      const limit = params.limit ? parseInt(params.limit, 10) : 100;
+      pager = {
+        total,
+        page,
+        page_size : limit,
+        page_min : (page - 1) * limit,
+        page_max : (page) * limit,
+        page_count : Math.ceil(total / limit),
+      };
       const paginatedQuery = filters.applyPaginationQuery(sql.concat(' ', tables), pager.page_size, pager.page_min);
       rows = await this.exec(paginatedQuery, queryParameters);
     }

server/lib/filter.js

@@ -312,14 +312,31 @@ class FilterParser {
 
     return `
       SELECT
-        COUNT(*) AS total, ${page} AS page,
-        ${limit} AS page_size, (${(page - 1) * limit}) AS page_min, (${(page) * limit}) AS page_max,
+        COUNT(*) AS total,
+        ${page} AS page,
+        ${limit} AS page_size, 
+        (${(page - 1) * limit}) AS page_min, 
+        (${(page) * limit}) AS page_max,
         CEIL(COUNT(*) / ${limit}) AS page_count
       ${table} 
       WHERE ${conditionStatements} 
     `;
   }
 
+  // FIXME: This strategie is temp solution to fix the pager.total compare to the rows.size
+  // The reason is we have to use COUNT(DISTINCT specific_column) FOR ALL OUR CASES in the above
+  // query
+  getAllResultQuery(sql) {
+    if (this._autoParseStatements) {
+      this._parseDefaultFilters();
+    }
+
+    const conditionStatements = this._parseStatements();
+    const group = this._group;
+
+    return `${sql} WHERE ${conditionStatements} ${group}`;
+  }
+
   applyPaginationQuery(sql, limit, page) {
     if (this._autoParseStatements) {
       this._parseDefaultFilters();