wrong nvs.exists result after nvs.rm()

[lu1210]

After removing a namespace-key value, the nvs.exists() function returns TRUE.

/ > nvs.write('config','ssid','xxxxxx') / > nvs.read('config','ssid') xxxxxx / > nvs.rm('config','ssid') true / > nvs.exists('config','ssid') true / > nvs.read('config','ssid') stdin:1: 261:key not found stack traceback: [C]: in field 'read' stdin:1: in main chunk [C]: in ?

[the0ne]

Hi @lu1210,

I tried to reproduce this:

/examples/lua > nvs.exists("wifi","name")
true
/examples/lua > nvs.exists("wifi","test")
false
/examples/lua > nvs.read("wifi","test")
stdin:1: 261:key not found
stack traceback:
    [C]: in field 'read'
    stdin:1: in main chunk
    [C]: in ?
/examples/lua > nvs.write("wifi","test","foo")
/examples/lua > nvs.read("wifi","test")
foo
/examples/lua > nvs.exists("wifi","test")
true
/examples/lua > nvs.rm("wifi","test")
true
/examples/lua > nvs.read("wifi","test")
stdin:1: 261:key not found
stack traceback:
    [C]: in field 'read'
    stdin:1: in main chunk
    [C]: in ?
/examples/lua > nvs.exists("wifi","test")
false
/examples/lua > 

Are you sure that there was no process that re-created the value in the background while you were testing? Which version have you been testing with? Can you try to reproduce with the latest version?

[lu1210]

if there is a read before nvs.exists() the result is correct. if the nvs.exists() is directly after the nvs.rm() the result is wrong

=~=~=~=~=~=~=~=~=~=~=~= PuTTY log 2019.07.08 12:08:03 =~=~=~=~=~=~=~=~=~=~=~= cpu.sleep(0) ets Jun 8 2016 00:22:57

rst:0x5 (DEEPSLEEP_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:2 load:0x3fff0018,len:4 load:0x3fff001c,len:3832 load:0x40078000,len:8464 ho 0 tail 12 room 4 load:0x40080400,len:5788 entry 0x400806bc Booting Lua RTOS...

/\ /\

/ _____/ \

/_____\

W H I T E C A T

Lua RTOS beta 0.1. Copyright (C) 2015 - 2018 whitecatboard.org

build 1561965505

commit 0f07c1e4932e9621f30231edbc409ac4b15fa9dc

Running from factory partition

board type GENERIC

cpu ESP32 rev 1 at 160 Mhz

spiffs start address at 0xf000, size 512 Kb

spiffs mounted on /

Lua RTOS beta 0.1 powered by Lua 5.3.4

Executing /system.lua ...

/ > -- exists after read / > nvs.write('config','ssid','abcd') / > nvs.read('config','ssid') abcd / > nvs.rm('config','ssid') true / > nvs.read('config','ssid') stdin:1: 261:key not found stack traceback: [C]: in field 'read' stdin:1: in main chunk [C]: in ? / > nvs.exists('config','ssid') false <------------- ok!! / > -- exists after remove / > nvs.write('config','ssid','abcd') / > nvs.read('config','ssid') abcd / > nvs.rm('config','ssid') true / > nvs.exists('config','ssid') true <------------------------ wrong / > nvs.read('config','ssid') stdin:1: 261:key not found stack traceback: [C]: in field 'read' stdin:1: in main chunk [C]: in ?j

[the0ne]

@lu1210 indeed!

/examples/lua > nvs.exists("wifi","name")
true
/examples/lua > nvs.exists("wifi","test")
false
/examples/lua > nvs.read("wifi","test")
stdin:1: 261:key not found
stack traceback:
    [C]: in field 'read'
    stdin:1: in main chunk
    [C]: in ?
/examples/lua > nvs.write("wifi","test","foo")
/examples/lua > nvs.read("wifi","test")
foo
/examples/lua > nvs.exists("wifi","test")
true
/examples/lua > nvs.rm("wifi","test")
true
/examples/lua > nvs.exists("wifi","test")
true
/examples/lua > nvs.read("wifi","test")
stdin:1: 261:key not found
stack traceback:
    [C]: in field 'read'
    stdin:1: in main chunk
    [C]: in ?
/examples/lua > nvs.exists("wifi","test")
false
/examples/lua > 

[the0ne]

@lu1210 please try #280

/examples/lua > nvs.exists("wifi","test")
false
/examples/lua > nvs.read("wifi","test")
stdin:1: 261:key not found
stack traceback:
    [C]: in field 'read'
    stdin:1: in main chunk
    [C]: in ?
/examples/lua > nvs.write("wifi","test","foo")
/examples/lua > nvs.read("wifi","test")
foo
/examples/lua > nvs.exists("wifi","test")
true
/examples/lua > nvs.rm("wifi","test")
true
/examples/lua > nvs.exists("wifi","test")
false
/examples/lua > nvs.read("wifi","test")
stdin:1: 261:key not found
stack traceback:
    [C]: in field 'read'
    stdin:1: in main chunk
    [C]: in ?
/examples/lua > nvs.exists("wifi","test")
false
/examples/lua > 

[lu1210]

Now, it works fine.