How frequently does the letter a appear in:
Q: Posting AJAX to SObject Tree resource not working been trying to have custom field in my opportunity . when the post happens I get the object in the right format however it doesnt post it, and doesnt really tell me the issue 
here is the object 
accountInfoJson {records:[{attributes:{type:Account,referenceId:acc1},name:everything,billingstreet:asdfasf\nundefined,billingcity:TORRANCE,billingstate:CA,billingpostalcode:90275,Contacts:{records:[{attributes:{type:Contact,referenceId:con1},firstname:rerer,lastname:rerer,Phone:454654,Email:23sdf@gmail.com}]},Opportunities:{records:[{attributes:{type:Opportunity,referenceId:opp1},name:everything,closedate:2018-09-01,stagename:Prospecting,Number_of_Seat_Trunks__c:12,Voice_MRC__c:20.00,Bandwidth_MRC__c:20.00,Hardware_MRC__c:20.00,CM_s_Quota_Value__c:20.00}]}}]}

the fields that are custom are all currency 
here is my POST 
var accountInfo = { records: [{
   attributes: { type: Account, referenceId: acc1 },
   name: $( input[id*=name] ).val(),

billingstreet: $( input[id*=pqStreet] ).val()+\n+ 
                 $(select[id*=unValue]).val(),
billingcity: $( input[id*=pqCity] ).val(),
billingstate: $( [id*=pqState] option:selected ).val(), 
billingpostalcode: $( input[id*=pqZip] ).val(),

   Contacts: {
     records: [{
       attributes: { type: Contact, referenceId: con1 },
       firstname: $([id*=contactFirstName]).val(),
       lastname: $([id*=contactLastName]).val(),
       Phone: $([id*=contactPhone]).val(),
       Email: $([id*=contactEmail]).val()
     }]
   },
   Opportunities: {
     records: [{
       attributes: { type: Opportunity, referenceId: opp1 },

        name: $([id=oppName]).val(),
       closedate: $([id*=closedate]).val(),
       stagename: Prospecting,
       Number_of_Seat_Trunks__c: $([id*=Number_of_Seat_Trunks__c]).val(),
       Voice_MRC__c: $([id*=Voice_MRC__c]).val(),
       Bandwidth_MRC__c: $([id*=Bandwidth_MRC__c]).val(),
       Hardware_MRC__c: $([id*=Hardware_MRC__c]).val(),
       CM_s_Quota_Value__c: $([id*=CM_s_Quota_Value__c]).val()
     }]
   }
 }]
};
console.log(accountInfoJson , accountInfo );

var accountInfoJson = JSON.stringify(accountInfo);
console.log(accountInfoJson  + accountInfoJson );
$.ajax({    type: POST,
    url: /services/data/v42.0/composite/tree/Account,
    headers : {
        Authorization : Bearer  + {!$Api.Session_Id} ,
         Content-Type : application/json
                  },
       data : accountInfoJson,
       success : function(response){

                    console.log(response fasf sa fsf,response);
                            },
       error: function(response){
       console.log(response);
                    displayError(response);

                            }
                        });


            })

all I see in console is 
{readyState: 0, getResponseHeader: ƒ, getAllResponseHeaders: ƒ, setRequestHeader: ƒ, overrideMimeType: ƒ, …}
Uncaught ReferenceError: displayError is not defined

A: Youre putting numbers inside of quotes. You need to use parseFloat to get the correct values:
CM_s_Quota_Value__c: parseFloat($([id*=CM_s_Quota_Value__c]).val())

Numbers must not be quoted in JSON in order to be valid. Your actual JSON should look like:
CM_s_Quota_Value__c: 20.00,

Note that the number is not quoted.

user
There are 154 "a"s.
assistant