Just copy and paste this to your database rules section.
{
"rules": {
"commentsGrid": {
".read": "true",
".write": "auth !== null && !data.exists() && newData.exists()",
"$nodes": {
".validate" : "root.child('commentsGrid/'+$nodes).exists()",
".write": "auth !== null && !data.exists() && newData.exists()",
"comments": {
".validate" : "root.child('commentsGrid/'+$nodes).exists()",
".write": "auth !== null &&
root.child('commentsGrid/'+$nodes).exists() &&
(data.child('user_id').val() === auth.uid
? true
: !data.exists() && newData.exists())",
"$uid": {
".validate": "newData.child('user_id').exists() &&
newData.child('timestamp').exists() &&
newData.child('comment').exists() &&
newData.child('name').exists() &&
newData.child('lineCount').exists() &&
root.child('commentsGrid/'+$nodes).exists()",
".write": "auth != null &&
root.child('commentsGrid/'+$nodes).exists() &&
(data.child('user_id').val() === auth.uid
|| root.child('commentUsers/'+ auth.uid +'/admin').exists()
? true
: !data.exists() && newData.exists())",
"name": {
".validate": "newData.isString() &&
newData.val().length > 0 &&
newData.val().length <= 30 &&
!newData.val().matches(/^ /) &&
!newData.val().matches(/ +$/) &&
!newData.val().matches(/ {2,}+/)"
},
"comment": {
".validate": "newData.isString() &&
newData.val().length > 0 &&
newData.val().length <= 1000 &&
!newData.val().matches(/ {30,}+/) &&
!newData.val().matches(/ +$/)"
},
"timestamp": { ".validate": "newData.isString() &&
newData.val().length > 0 &&
newData.val().length <= 13" },
"user_id": {
".read":"true",
".write": "auth !== null && !data.exists() && newData.exists()",
},
"lineCount" : {
".validate": "newData.isNumber()",
".write": "auth !== null && !data.exists() && newData.exists()"
},
"$other": { ".validate": false }
}
},
"replys": {
".read":"true",
".validate" : "root.child('commentsGrid/'+$nodes).exists()",
".write": "auth !== null &&
root.child('commentsGrid/'+$nodes).exists() &&
(data.child('user_id').val() === auth.uid
? true
: !data.exists() && newData.exists())",
"$uidd": {
".read":"true",
".validate": "newData.child('user_id').exists()",
".write": "auth !== null &&
root.child('commentsGrid/'+$nodes).exists() &&
(data.child('user_id').val() === auth.uid
|| root.child('commentsGrid/'+$nodes+'/replys/'+$uidd+'/mods/'+auth.uid).exists()
|| root.child('commentUsers/'+ auth.uid +'/admin').exists()
? true
: !data.exists() && newData.exists())",
"replied": {
".read":"true",
".write": "auth !== null && newData.exists()",
},
"user_id": {
".read":"true",
".write": "auth !== null && !data.exists() && newData.exists()",
},
"mods": {
".read":"true",
".write": "auth !== null &&
root.child('commentsGrid/'+$nodes+'/replys/'+$uidd+'/user_id').val() === auth.uid",
},
"$uid": {
".read":"true",
".validate": "newData.child('user_id').exists() &&
newData.child('timestamp').exists() &&
newData.child('comment').exists() &&
newData.child('name').exists() &&
newData.child('lineCount').exists() &&
root.child('commentsGrid/'+$nodes).exists() &&
root.child('commentsGrid/'+$nodes+'/replys/'+$uidd).exists()",
".write": "auth != null &&
root.child('commentsGrid/'+$nodes).exists() &&
(data.child('user_id').val() === auth.uid
|| root.child('commentsGrid/'+$nodes+'/replys/'+$uid+'/mods/'+auth.uid).exists()
|| root.child('commentUsers/'+ auth.uid +'/admin').exists()
? true
: !data.exists() && newData.exists())",
"name": {
".validate": "newData.isString() &&
newData.val().length > 0 &&
newData.val().length <= 30 &&
!newData.val().matches(/^ /) &&
!newData.val().matches(/ +$/) &&
!newData.val().matches(/ {2,}+/)"
},
"comment": {
".validate": "newData.isString() &&
newData.val().length > 0 &&
newData.val().length <= 1000 &&
!newData.val().matches(/ {30,}+/) &&
!newData.val().matches(/ +$/)"
},
"timestamp": { ".validate": "newData.isString() &&
newData.val().length > 0 &&
newData.val().length <= 13"
},
"user_id": {
".read":"true",
".write": "auth !== null && !data.exists() && newData.exists()",
},
"lineCount" : {
".validate": "newData.isNumber()",
".write": "auth !== null && !data.exists() && newData.exists()"
},
"$other": { ".validate": false }
}
}
},
"active": { ".validate": false },
"$other": { ".validate": false }
}
},
"commentUsers": {
"$uid": {
".read": "auth != null && auth.uid == $uid",
".validate": "newData.child('name').exists() &&
newData.child('email').exists() &&
newData.child('user_id').exists()",
".write": "auth != null && (auth.uid == $uid || data.child('user_id').val() === auth.uid)",
"name": {
".validate": "newData.isString() &&
newData.val().length > 0 &&
newData.val().length <= 30 &&
!newData.val().matches(/^ /) &&
!newData.val().matches(/ {2,}+/)"
},
"email": {
".validate": "newData.isString() &&
newData.val().matches(/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,4}$/i) &&
newData.val().length > 0"
},
"user_id": {
".validate": "newData.isString() &&
newData.val()==$uid"
},
"$other": { ".validate": false },
}
},
"$other": { ".validate": false },
}
}If you change default name length prop value you need to change all
"name": {
...
newData.val().length <= 30 && --> this values wherever you see change it
...
}
fields too. The same goes for comment length. See it here in detail.
If you don't know how to change database rules see detailed here.