I need to save records from visualforce page.My requirement is I need to get related objects dynamically based on any parent record id.So I created 1 Vf component and controller for that where I am getting related object and fields which can be displayed on vf page but i need to edit and save some record.How to achieve that.Please help me with this. Here is the code I have tried:

VF component

<apex:component controller="CustomRelatedListControllerNew" allowDML="true" >
    <apex:attribute assignTo="{!typeOf}" name="typeOfParam" required="true" type="String" description="Type of Related Record" />
    <apex:attribute assignTo="{!fieldlist}" name="relatedFieldlistParam" required="true" type="String[]" description="String of related Fields." />
    <apex:attribute assignTo="{!relatedField}" name="relatedFieldParam" required="true" type="String" description="String of related field." />   
    <apex:attribute assignTo="{!relatedId}" name="relatedIdParam" required="true" type="String" description="String of related Id." />
    <!---<apex:attribute assignTo="{!obj}" name="relatedIdobject" required="true" type="sObject[]" description="String of related objects." />-->

    <apex:form >
    <apex:pageblock title="{!typeOf}" id="childobj">
    <apex:commandButton value="Save" action="{!Save}" reRender="childobj"/> 
    <apex:pageBlockTable var="o" value="{!objects}">

      <apex:repeat value="{!fieldlist}" var="fldNames">
       <apex:column > 

                <apex:outputText value="{!$ObjectType[typeOf].fields[fldNames].Name}">

                </apex:outputText>

        </apex:column>
        <br></br>
        <apex:column >
        <apex:inputField value="{!o[fldNames]}">
        <!---<apex:inlineEditSupport showOnEdit="saveButton,cancelButton"
                        hideOnEdit="editButton" event="ondblclick"
                        changedStyleClass="myBoldClass" resetFunction="resetInlineEdit"/>-->
                        </apex:inputField> 
        </apex:column>
        <br/>
          </apex:repeat>



    </apex:pageBlockTable>

    </apex:pageblock>

    </apex:form>
</apex:component>

Controller:

public class CustomRelatedListControllerNew {
    private ApexPages.StandardController controller {get; set;}
    public String typeOf { get; set; }  
    public String relatedField { get; set; }
    public List<String> fieldlist{ get; set; }
    public Id relatedId { get; set; }
    public List<sObject> obj{ get; set; }
    public String query;
    public Integer n;
    public List<sObject> objects;

   public List<sObject> getObjects() {
        n = fieldlist.size();
        System.debug(n);
        //String d = ApexPages.currentPage().getParameters().get('id');
        //System.debug(d);
        query = fieldlist.get(0);
        //String query1 = 'SELECT Id'+ ' ' + 'FROM'+ ' ' + 'Attachment';
        for(Integer i=1;i<fieldlist.size();i++){
            query = query+ ' , ' + fieldlist.get(i) ;
            System.debug(query);
        }

        System.debug('qqq****'+'SELECT'+ ' '+ query +' '+'FROM '+ typeOf+' '+'WHERE' +' '+  relatedField + ' = \'' + relatedId +'\'');
        objects = Database.query('SELECT'+ ' '+ query +' '+'FROM '+ typeOf+' '+'WHERE' +' '+  relatedField + ' = \'' + relatedId +'\'');
       //return Database.query('SELECT'+ ' '+ query +' '+'FROM '+ typeOf+' '+'WHERE' +' '+  relatedField + ' = \'' + relatedId +'\'');
       return objects;
    }
    public void setObjects(List<sObject> objects)
    {
        System.debug('ooo'+objects);
        this.objects = objects;
        //objects = s;
        //update objects;
        
    }
   public PageReference Save() {
        setObjects();
        update objects;
        System.debug('ooo'+objects);
        return null;
    }

}

getting child records in 'objects' but it's not getting saved and setobject method also not getting invoked.Where I am doing wrong here please help me with this