diff --git a/apps/iot/src/iot_mock.erl b/apps/iot/src/iot_mock.erl
index b2dfdcd..98ed593 100644
--- a/apps/iot/src/iot_mock.erl
+++ b/apps/iot/src/iot_mock.erl
@@ -13,9 +13,9 @@
 -export([insert_hosts/0]).
 
 insert_hosts() ->
-    lists:foreach(fun(_) ->
-        Id0 = iot_util:rand_bytes(16),
-        Id = list_to_binary(Id0),
+    lists:foreach(fun(Id0) ->
+        %Id0 = iot_util:rand_bytes(16),
+        Id = integer_to_binary(Id0),
         Name = <<"N1000_0001">>,
         Model = <<"N1000">>,
         CellId = <<"公共教学楼"/utf8>>,
diff --git a/apps/iot/src/model/host_model.erl b/apps/iot/src/model/host_model.erl
index f991a03..5787f1c 100644
--- a/apps/iot/src/model/host_model.erl
+++ b/apps/iot/src/model/host_model.erl
@@ -12,7 +12,7 @@
 -include_lib("stdlib/include/qlc.hrl").
 
 %% API
--export([get_hosts/2, insert/4, change_status/2, delete/1, table_size/0]).
+-export([get_hosts/2, insert/4, change_status/2, delete/1, table_size/0, filter_hosts/3]).
 
 %% 获取app信息
 get_hosts(Start, Limit) when is_integer(Limit), is_integer(Start), Start >= 0, Limit > 0 ->
@@ -38,6 +38,25 @@ get_hosts(Start, Limit) when is_integer(Limit), is_integer(Start), Start >= 0, L
             Error
     end.
 
+filter_hosts(Pred, Start, Limit) when is_function(Pred, 1), is_integer(Limit), is_integer(Start), Start >= 0, Limit > 0 ->
+    Fun = fun() ->
+        Q = qlc:q([E || E <- mnesia:table(host)]),
+        qlc:fold(fun(Host, Acc) ->
+            case Pred(Host) of
+                true  -> [Host|Acc];
+                false -> Acc
+            end
+                 end, [], Q)
+
+          end,
+    case mnesia:transaction(Fun) of
+        {atomic, Items} when is_list(Items) ->
+            Items1 = lists:reverse(Items),
+            {ok, lists:sublist(Items1, Start + 1, Limit)};
+        {aborted, Error} ->
+            Error
+    end.
+
 insert(Id, Name, Model, CellId) ->
     Host = #host{
         id = Id,
diff --git a/rebar.config b/rebar.config
index 0374bc8..adfa6eb 100644
--- a/rebar.config
+++ b/rebar.config
@@ -14,8 +14,9 @@
           sasl]},
 
         % {mode, dev},
+        {mode, prod},
 
-        %% automatically picked up if the files
+    %% automatically picked up if the files
         %% exist but can be set manually, which
         %% is required if the names aren't exactly
         %% sys.config and vm.args