Odoo - Filter child records in parent class - odoo-8

Question

I am using Odoo 10-e. I am working on a sample module.
I have 5 models (customer, product, order, order details, movement)
Customer :
class Customer(models.Model):
_name ="amgl.customer"
…… all other fields related to customer
product_ids = fields.Many2many('amgl.products', string='Products')
Products :
class Products(models.Model):
_name ="amgl.products"
…… all other fields related to product
customer_ids = fields.Many2many('amgl.customer', string='Customers')
Order :
class Order(models.Model):
_name ="amgl.order"
order_line = fields.One2many('amgl.order_line', 'order_id', string='Order Lines')
…… all other fields related to Order
Order Details :
class OrderLine(models.Model):
_name = 'amgl.order_line'
order_id = fields.Many2one('amgl.order', string='Orders')
products = fields.Many2one('amgl.products', string="Products")
…… all other fields related to order details
Movement
class Movement(models.Model):
_name = 'amgl.metal_movement'
customer = fields.Many2one("amgl.customer", string="Customer", required=True)
order_lines = fields.One2many('amgl.order_line','metal_movement_id')
…… all other fields related to movement
What i am trying to do is, i am creating a movement form in which user will select a customer from customer drop down first then user will add order_lines and in that he will be able to add products i want to filter products which are associated with above selected customer . How can i do that ? I have been trying since last month.
Movement View
<odoo>
<data>
<record id="action_metal_movement" model="ir.actions.act_window">
<field name="name">Metal Movement Request</field>
<field name="type">ir.actions.act_window</field>
<field name="res_model">metal.movement</field>
<field name="view_mode">tree,form</field>
<field name="help" type="html">
<p class="oe_view_nocontent_create">
Click to create
</p><p>
<!-- More details about what a user can do with this object will be OK -->
</p>
</field>
</record>
<record id="form_metal_movement" model="ir.ui.view">
<field name="name">Metal Movement Request </field>
<field name="model">metal.movement</field>
<field name="arch" type="xml">
<form string="Metal Movement">
<sheet>
<group>
<group string="Metal Movement Request">
<field name="date_create" string="Date Created"/>
<field name="reference"/>
<field name="metal_movement_type"/>
<field name="first_approve"/>
<field name="second_approve" domain="[('id', '!=', first_approve)]"/>
<field name="customer"/>
<field name="sepcial_instruction" widget="html"/>
</group>
<group string="Metal Movement From">
<group colspan="6">
<field name="custodian"/>
<field name="mmf_name"/>
<field name="mmf_account_number"/>
<field name="mmf_account_type"/>
</group>
<group string="Metal Movement To" colspan="6">
<field name="mmt_name"/>
<field name="mmt_address" attrs="{'invisible':[('metal_movement_type', '=', 'IT')]}"/>
<field name="mmt_account_number" />
<field name="mmt_company" attrs="{'invisible':[('metal_movement_type','not in',('AC','IPPU','IT'))]}"/>
<field name="pickup_date" string="Pick up Datetime" attrs="{'invisible':[('metal_movement_type','not in',('AC','IPPU'))]}"/>
</group>
</group>
<group string="Metals To Be Moved" colspan="12">
<field name="order_lines">
<tree editable="bottom">
<field name="quantity" string="Quantity"/>
<field name="products" domain="[('customer_ids','in', parent.customer)]" string="Product Name"/>
<field name="weight" string="Weight"/>
<field name="total_weight" string="Total Weight"/>
</tree>
</field>
</group>
</group>
</sheet>
</form>
</field>
</record>
</data>
</odoo>

Answer 1

Thank you for updation of question.
First add customer in product field context.
<field name="order_lines">
<tree editable="bottom">
<field name="quantity" string="Quantity"/>
<field name="products" context="{'customer_id':parent.customer}" string="Product Name"/>
<field name="weight" string="Weight"/>
<field name="total_weight" string="Total Weight"/>
</tree>
</field>
Then in product's model write it's name_get method like this.
#api.multi
def name_get(self):
if self.env.context('customer_id',False):
customer = self.env['amgl.customer'].browse(self.env.context('customer_id',False))
for product in customer.product_ids:
res.append((product.id,product.name))
else:
res=super(product_product,self).name_get()
return res
Thats it.