Cannot change the boolean in table lua love2d - lua

Question

I am creating a simple platformer with love2d in lua.
I want the player to stand on the ground so that it won't fall.
However I got some proablem that I cannot change the string of a table return from player.lua
(It is a table because the player.lua return m and the last sentance, and m is a table)
I tested that the isOnFloor function is work, but I just can't change the boolean in the player table.
Main.lua
local love = require("love")
local tileMapper = require("tile/tileMapper")
local player = require "player"
local isOnFloor = require("isOnFloor")
function love.load()
love.window.setMode(1080, 640)
love.window.setTitle("Simple Platformer")
tileMapper:spawn()
tiles = tileMapper.tiles
player:setValue()
love.keyboard.keyPressed = {}
end
function love.update(dt)
for i = 1, #tiles do
if isOnFloor(player.x, player.y, tiles[i].x, tiles[i].y, 32, 32 * 3, 72, 72) then
player.currentState = "ground" -- I wanna change it here but when I go back to
--player.lua and try to let it out put the self.currentState, nothing changed --
else
player.currentState = "air"
end
end
player:update(dt)
love.keyboard.keyPressed = {}
end
I try to print out the player.currentState the the line after I set the player.currentState = "ground". It printed out "ground"
But if I print it in player.lua, it is always "air"
player.lua(I didn't paste some of the code here)
m = {}
function m:setValue()
self.x = 400
self.y = 50
self.vtx = 0
self.y_input = 0
self.speed = 300
self.jumpForce = -800
self.gravity = 100
self.anim = {idle = {img = love.graphics.newImage("assets/Idle.png"), maxFrame = 10},
run = {img = love.graphics.newImage("assets/Run.png"), maxFrame = 11},
jump = {img = love.graphics.newImage("assets/Jump.png"), maxFrame = 0},
fall = {img = love.graphics.newImage("assets/Fall.png"), maxFrame = 0}}
self.currentAnim = nil
for i = 1, #self.anim do
self.anim[i]:setFilter("nearest", "nearest")
end
self.frame = 0
self.timer = 0
self.currentState = nil
end
function m:update(dt)
print(self.currentState)
---------------------- Player States Update ------------------------
self:getXInput()
if self.currentState == "ground" then
if self.vtx == 0 then
self.currentAnim = self.anim.idle
elseif not(self.vtx == 0) then
self.currentAnim = self.anim.run
end
elseif self.currentState == "air" then
self.y_input = self.y_input + self.gravity
if self.y_input > 0 then
self.currentAnim = self.anim.fall
elseif self.y_input < 0 then
self.currentAnim = self.anim.jump
end
end
------------------------ Anim --------------------
self:animUpdate(dt)
if love.keyboard.keyPressed["space"] == true then
self.y_input = self.jumpForce
end
self.x = self.x + self.speed * dt * self.vtx
self.y = self.y + self.y_input * dt
end
return m
If you have an idea of this porblem, please tell, thank you.