The model:
class Product(models.Model):
name = models.CharField(max_length = 128)
def __unicode__(self):
return self.name
class Receipt(models.Model):
name = models.CharField(max_length=128)
components = models.ManyToManyField(Product, through='ReceiptComponent')
class Admin:
pass
def __unicode__(self):
return self.name
class ReceiptComponent(models.Model):
product = models.ForeignKey(Product)
receipt = models.ForeignKey(Receipt)
quantity = models.FloatField(max_length=9)
unit = models.ForeignKey(Unit)
def __unicode__(self):
return unicode(self.quantity!=0 and self.quantity or '') + ' ' + unicode(self.unit) + ' ' + self.product.genitive
The idea:
there are a components on stock. I'd like to find out which recipes I can made with components which I have.
It's not easy - but possible - I made a SQL view, which gets the solution. But I'm learning python and Django so I'd like to make it Django-style ;D
The concept of solution:
get the set of recipes which has at last one component:
list_of_available_components = ReceiptComponent.objects.filter(product__in=list_of_available_products).distinct()
list_of_related_receipts = Receipt.objects.filter(receiptcomponent__in = list_of_available_components).distinct()
get recipes (from list_of_related_receipts) which has not at last one component
list_of_incomplete_recipes = (SELECT * FROM drinkbook_receiptcomponent LEFT JOIN drinkstore_stock_products USING(product_id) WHERE drinkstore_stock_products.stock_id IS NULL AND receipt_id IN (SELECT receipt_id FROM drinkbook_receiptcomponent JOIN drinkstore_stock_products USING(product_id)))
get recipes (from list_of_related_receipts) which are not in "list_of_incomplete_recipes"
Heh. How stupid am I. This could be solved much easier. I don't have to find receipes which have at least one component. I can (the same way!) find recipes which i can't do because there is at least one component which i DON'T have.
list_of_unavailable_components = ReceiptComponent.objects.exclude(product__in=list_of_available_products).distinct()
And now.
list_of_available_receipts = Receipt.objects.exclude(receiptcomponent__in = list_of_unavailable_components).distinct()
Simple and clean. Thank you for cooperation ;D
Related
I have tried to think about how the following SQL query would be structured as a Django ORM query but I have had no luck in my multiple attempts. Can anyone help?
SELECT targets_genetarget.gene, count(targets_targetprediction.gene) as total
FROM targets_genetarget
LEFT OUTER JOIN targets_targetprediction on targets_targetprediction.gene =
targets_genetarget.gene
WHERE list_name LIKE %s
GROUP BY targets_genetarget.gene
class GeneTarget(models.Model):
list_name = models.CharField(max_length=100)
gene = models.CharField(max_length=50)
date_added = models.DateField(auto_now=True)
class Meta:
unique_together = (('list_name', 'gene'),)
def __str__(self):
return self.list_name
class TargetPrediction(models.Model):
specimen_id = models.CharField(max_length=100)
patient_peptide = models.ForeignKey(Peptide, on_delete=models.CASCADE, verbose_name="Peptide", related_name="predictions")
allele = models.ForeignKey(Allele, on_delete=models.CASCADE, verbose_name="Allele", related_name="predictions")
gene = models.CharField(max_length=50)
class Meta:
unique_together = (('specimen_id', 'patient_peptide', 'allele', 'gene'),)
def get_absolute_url(self):
return f'/samples/specid-{self.specimen_id}'
def __str__(self):
return (f'Specimen: {self.specimen_id} Peptide: {self.patient_peptide} Allele: {self.allele} Gene: {self.gene} ')
There's nothing stopping you declaring the TargetPrediction.gene field as a foreign key using the to_field attribute, so you wouldn't need to change the data at all:
class TargetPrediction(models.Model):
...
gene = models.ForeignKey("GeneTarget", to_field="gene")
Now your query simply becomes:
GeneTarget.objects.filter(list_name="whatever").values("gene").annotate(total=Count("targetprediction"))
Put fields of an employee in accounting through a module
Hi. I am creating a module for a client that has a specific need. He wants us to add a price per hour to employees. That is, the price charged by the employee each hour of work. Then create a small expense report that goes into accounting.
The first thing I have done is to modify the employee module using _inherit to add two fields. Nickname that allows employees to filter by nickname. And the hourly price of that employee (what this employee charges for every hour).
employee example changes
The second has been to create a new model that allows adding employees and importing said data. In addition to adding a description.
form example
The challenge now is to link this information to the accounting module so that it will appreciate as a Journal Item and then have the copy confirmed to be appreciated as a Journal Entries.
I am really new in the development of odoo and there are many things that I am still assimilating. So the questions I have are the following:
How could I do this?
Do I have a problem with what I have done so far?
It is my first post and I would appreciate the help. Thanks in advance.
This its the code:
class EmpleadoObra(models.Model):
_inherit = 'hr.employee'
apodo = fields.Char('apodo', readonly=False, store=True)
precio_por_hora = fields.Float('Salario por hora', store=True)
#api.model
def name_search(self, name='', args=None, operator='ilike', limit=100):
args = args or []
recs = self.browse()
if name:
recs = self.search(['|', ('apodo', 'ilike', name), ('name', operator, name) ] + args, limit=limit)
return recs.name_get()
class EmpleadosProductos(models.Model):
_name = "employee.as.product"
# _inherits = {'hr.employee' : 'empleado_id'}
employee_line = fields.One2many(
'employee.line',
'id',
string='Employee Lines'
)
class EmployeLine(models.Model):
_name = 'employee.line'
descripcion = fields.Text(string='Descripción', required=False)
employee_id = fields.Many2one(
'hr.employee',
string="Empleado",
requiered=True,
change_default=True
)
apodo = fields.Char('apodo', readonly=False)
precio_por_hora = fields.Float('precio_por_hora')
_rec_name = 'apodo'
#api.onchange('employee_id')
def onchange_employee_id(self):
addr = {}
if not self.employee_id.display_name:
return addr
if not self.employee_id.apodo:
self.apodo = "no apodo"
else:
self.apodo = self.employee_id.apodo
self.precio_por_hora = self.employee_id.precio_por_hora
return addr
I've the following model, and the extend to the product_template
class Version(models.Model):
_name='product_cars_application.version'
name = fields.Char()
model_id = fields.Many2one('product_cars_application.model',string="Model")
brand_id = fields.Char(related='model_id.brand_id.name',store=True,readonly=1)
year_id = fields.Char(related='model_id.year_id.name',store=True,readonly=1)
from openerp.osv import osv,fields as Fields
class product_template(osv.osv):
_name = 'product.template'
_inherit = _name
_columns = {
'versions_ids':Fields.many2many('product_cars_application.version',string='Versions')
}
And the following controller which I need to filter products by version_id
#http.route('/pa/get_products/<version_id>', auth='none', type='json',website=True)
def get_products(self,version_id,**kwargs):
#TODO APPEND SECURITY
version_id = int(version_id)
products = http.request.env['product.template'].sudo().search([(version_id,'in','versions_ids')])
I get none products in return while the version_id is in versions_ids.
Do anyone knows what I'm doing wrong?
I need to make the value of comparison of the field a list, maybe becouse the field versions_ids is a many2many
I have solved like this:
#http.route('/pa/get_products/<version_id>', auth='none', type='json',website=True)
def get_products(self,version_id,**kwargs):
#TODO APPEND SECURITY
products = http.request.env['product.template'].sudo().search([('versions_ids','in',[version_id])])
list = []
for p in products:
list.append([p.id, p.name])
return {
'products':list,
}
"return products.ids" is missing inside get_products like:
#http.route('/pa/get_products/<version_id>', auth='none', type='json',website=True)
def get_products(self,version_id,**kwargs):
#TODO APPEND SECURITY
version_id = int(version_id)
products = http.request.env['product.template'].sudo().search([(version_id,'in','versions_ids')])
return products.ids
I have the following 1 - M (one way) relationship:
Customer (1) -> (M) Address
I am trying to filter the addresses for a specific customer that contain certain text e.g.
def results = Customer.withCriteria {
eq "id", 995L
addresses {
ilike 'description', '%text%'
}
}
The problem is that this returns the Customer and when I in turn access the "addresses" it gives me the full list of addresses rather than the filtered list of addresses.
It's not possible for me to use Address.withCriteria as I can't access the association table from the criteria query.
I'm hoping to avoid reverting to a raw SQL query as this would mean not being able to use a lot functionality that's in place to build up criteria queries in a flexible and reusable manner.
Would love to hear any thoughts ...
I believe the reason for the different behavior in 2.1 is documented here
Specifically this point:
The previous default of LEFT JOIN for criteria queries across associations is now INNER JOIN.
IIRC, Hibernate doesn't eagerly load associations when you use an inner join.
Looks like you can use createAlias to specify an outer join example here:
My experience with this particular issue is from experience with NHibernate, so I can't really shed more light on getting it working correctly than that. I'll happily delete this answer if it turns out to be incorrect.
Try this:
def results = Customer.createCriteria().listDistinct() {
eq('id', 995L)
addresses {
ilike('description', '%Z%')
}
}
This gives you the Customer object that has the correct id and any matching addresses, and only those addresses than match.
You could also use this query (slightly modified) to get all customers that have a matching address:
def results = Customer.createCriteria().listDistinct() {
addresses {
ilike('description', '%Z%')
}
}
results.each {c->
println "Customer " + c.name
c.addresses.each {address->
println "Address " + address.description
}
}
EDIT
Here are the domain classes and the way I added the addresses:
class Customer {
String name
static hasMany = [addresses: PostalAddress]
static constraints = {
}
}
class PostalAddress {
String description
static belongsTo = [customer: Customer]
static constraints = {
}
}
//added via Bootstrap for testing
def init = { servletContext ->
def custA = new Customer(name: 'A').save(failOnError: true)
def custB = new Customer(name: 'B').save(failOnError: true)
def custC = new Customer(name: 'C').save(failOnError: true)
def add1 = new PostalAddress(description: 'Z1', customer: custA).save(failOnError: true)
def add2 = new PostalAddress(description: 'Z2', customer: custA).save(failOnError: true)
def add3 = new PostalAddress(description: 'Z3', customer: custA).save(failOnError: true)
def add4 = new PostalAddress(description: 'W4', customer: custA).save(failOnError: true)
def add5 = new PostalAddress(description: 'W5', customer: custA).save(failOnError: true)
def add6 = new PostalAddress(description: 'W6', customer: custA).save(failOnError: true)
}
When I run this I get the following output:
Customer A
Address Z3
Address Z1
Address Z2
I have the following code in a view to get some of the information on the account to display. I tried for hours to get this to work via ORM but couldn't make it work. I ended up doing it in raw SQL but what I want isn't very complex. I'm certain it's possible to do with ORM.
In the end, I just want to populate the dictionary accountDetails from a couple of tables.
cursor.execute("SELECT a.hostname, a.distro, b.location FROM xenpanel_subscription a, xenpanel_hardwarenode b WHERE a.node_id = b.id AND customer_id = %s", [request.user.id])
accountDetails = {
'username': request.user.username,
'hostname': [],
'distro': [],
'location': [],
}
for row in cursor.fetchall():
accountDetails['hostname'].append(row[0])
accountDetails['distro'].append(row[1])
accountDetails['location'].append(row[2])
return render_to_response('account.html', accountDetails, context_instance=RequestContext(request))
It would be easier if you post models. But from SQL I'm assuming the models are like this:
class XenPanelSubscription(models.Model):
hostname = models.CharField()
distro = models.CharField()
node = models.ForeignKey(XenPanelHardwareNode)
customer_id = models.IntegerField()
class Meta:
db_table = u'xenpanel_subscription'
class XenPanelHardwareNode(models.Model):
location = models.CharField()
class Meta:
db_table = u'xenpanel_hardwarenode'
Based on these models:
accountDetails = XenPanelSubscription.objects.filter(customer_id = request.user.id)
for accountDetail in accountDetails:
print accountDetail.hostname, accountDetail.distro, accountDetail.node.location