ruby on rails - Update value in hash array with json.parse -


i have a = first 

=> <ng::entityconfiguration id: 15881, entity_id: 1, entity_type: "ng::company", key: "wpa2.psk", value: "[{"ssid":"lvl6-staff","password":"987654321", created_at: "2016-11-08 05:13:04", updated_at: "2016-11-08 05:13:04", name: "wifi/level 6">

so when call a.value, return => "[{"ssid":"lvl6-staff","password":"987654321","dhcp":"enabled"}]"

then, wanted value password:

x = json.parse(a.value) x.last['password'] => "987654321"

my question is, after password value, want update password value '123456789' , save it. how achieve this?

this should simple.

string = '[{"ssid":"lvl6-staff","password":"987654321","dhcp":"enabled"}]'  # `a.value` json = json.parse(string) new_password = '123456'       # or whatever json.first['password'] = new_password new_string = json.to_json     # "[{\"ssid\":\"lvl6-staff\",\"password\":\"123456\",\"dhcp\":\"enabled\"}]"

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