I am having a really weird problem while attempting to do a very simple thing. I am doing an .includes on a model to get a row of data from the database. On the return object I need to remove certain attributes conditionally. And the final aim is to reinsert this row as a new record based on the changes I make on the attributes using my conditions.
def myUpdate
dbObj = Obj.includes(:name,
:addr1,
:addr2,
:state,
:description).find(params[:id])
#dbObjective.attributes().except('description')
#dbObjective.description = nil
#dbObjective.attributes().delete('description')
# After setting more attributes, persist this object
end
I tried all possibilities that I could think of, but the attribute is just not getting removed. What am I missing? I am on Ruby on Rails 4.2.
includes is used to include associated tables in your query for join queries and eager loading, not for table attributes. You do not need to do anything special to access an object's attributes.
attributes returns a Hash instance containing the record's attributes as key-value pairs, and operating on it will change only the Hash instance itself, not the record.
There are several ways to update attributes. One of the easiest ways is using the built in setter methods given to you by ActiveRecord. If you really want to change attributes using the Hash API you can store the attributes hash in a variable, manipulate the hash, and pass it as an argument to update, which accepts an attributes hash as it's argument.
Using setter methods
def myUpdate
dbObj = Obj.find(params[:id])
dbObj.description = 'new_description'
dbObj.name = 'new_name
dbObj.save
end
Using update
def myUpdate
dbObj = Obj.find(params[:id])
attributes = dbObj.attributes # This is how you would update the object by manipulating the attributes hash
attributes.delete(:description) # this will NOT end up changing the attribute in the DB
attributes[:name] = nil # this will successfully set name to NULL in the DB
dbObj.update(attributes) # pass the manipulated hash to the `update` method to persist the changes
end
deleteing fields from the hash will not have an effect on the persisted object. update only performs an insert on fields present in the hash that have changed.
Related
I have:
a) given product_template_id (i.e. id 100) and
b) a duplicated product_template_id (i.e. id 200) created using copy() method
copy() method copies only product.template model, so suppliers for that specific product are not copied.
I would like to duplicate all suppliers for that model, but now I am wondering which is the right way to do it in Odoo.
If I understood the model properly suppliers prices for a given product are stored in product_supplierinfo table, where each record that points to a given product_tmpl_id specifices a supplier price/qty for a given product_template.
Which would be the way in Odoo to search for all records that point to a given product_tmpl_id (i.e. 100), duplicate them changing product_tmpl_id to the new one (i.e. 200)?
Excerpt from the ORM Documentation:
copy (bool) -- whether the field value should be copied when the record is duplicated (default: True for normal fields, False for One2many and computed fields, including property fields and related fields)
The field you're referring to is seller_ids, whose field definition is below:
seller_ids = fields.One2many('product.supplierinfo', 'product_tmpl_id', 'Vendors')
The copy attribute is not explicitly defined, so it is False by default (as explained in the documentation above). If you want this field to copy along with the other values during the standard product "Duplicate" (copy method), you can do this:
class ProductTemplate(models.Model):
_inherit = 'product.template'
# This only changes the copy attribute of the existing seller_ids field.
# All other attributes (string, comodel_name, etc.) remain as they are defined in core.
seller_ids = fields.One2many(copy=True)
Alternatively
If you want to only have the field copied sometimes, you can extend the copy method to look for a specific context value and only copy based on that.
# This may take some tweaking, but here's the general idea
#api.multi
def copy(self, vals):
new_product = super(YourClass, self).copy(vals)
if vals.get('copy_sellers'):
new_product.seller_ids = self.seller_ids.copy({'product_id': new_product.id})
return new_product
# Whatever you have calling the copy method will need to include copy_sellers in vals
vals.update({'copy_sellers': True})
product.copy(vals)
I have the following structure
lookups --> Object
lookups.CATEGORIES --> array of category objects
lookups.TIMEZONES --> array of timezone objects
I would like to add new object, which is a lookup object which has lookup_type property. It could be either 'CATEGORY' or 'TIMEZONE'.
Depending on lookup_type, the newly added object has to be added either to CATEGORIES or TIMEZONES object. How this could be achieved?
The structure of lookups object
lookups: {CATEGORIES:[{obj1}, {obj2}...], TIMEZONES:[{obj1}, {obj2}, {obj3}...]}
You can use spread on the nested object or array too:
return {
...state,
[action.lookupType]: [
...state[action.lookupType],
action.value,
]
};
That would add a new item to Categories or Timezone, if you want to replace a value or insert it at an index etc then you should construct the new array how you want it just above the return and pass that instead. Also note that array spread is ES7.
You probably want to pass your lookup object as the payload of an action, which your lookup reducer handles. In the lookup reducer check for the value action.payload.lookup_type and return the state with a new CATEGORIES or TIMEZONES array containing the old values of that array with the lookup object insterted. You should probably check out some redux examples first, if you are unsure how to work with it.
I'm coding an API and I'm doing the create method. I'm doing the following without needing a form:
$params = array('title' => 'test', 'parent_id' => 781);
// bind data
$place = new Place();
$place->bind($params);
// validate params
$errors = $this->validator->validate($place);
I need to check that parent_id is a correct value (its object exist - i know how to do this) and after that, I need to set some values dependent on the parent. So at the end the Place object will have the fields: title, parent_id, level, country_id for example.
How would you do this? On the validation? How? If not, how to avoid calling two times the DB to get the parent object?
You should first validate & then set any additional values afterward. Anything that modifies the value does not belong in the validator.
If your using doctrine, it should load the parent object into memory when you first access it, so it won't need to actually query the database again when you access the parent object a second time.
There are some fields present in table which i don't want to be visible outside?
Like created_on, is_first etc. I want to set value of these fields by using callbacks with in model but not accessible for some one to set it.
def is_new =(is_new)
raise 'is_new is immutable!'
end
The standard way to prevent mass-assignment on certain fields is attr_protected and attr_accessible:
http://api.rubyonrails.org/classes/ActiveModel/MassAssignmentSecurity/ClassMethods.html
In your case, you would have to add this line in your model:
attr_protected :created_on, :is_first
Even if you have a form with these fields, their values will be ignored, when used in a new/create call.
How can I interact with objects I've created based on their given attributes in Ruby?
To give some context, I'm parsing a text file that might have several hundred entries like the following:
ASIN: B00137RNIQ
-------------------------Status Info-------------------------
Upload created: 2010-04-09 09:33:45
Upload state: Imported
Upload state id: 3
I can parse the above with regular expressions and use the data to create new objects in a "Product" class:
class Product
attr_reader :asin, :creation_date, :upload_state, :upload_state_id
def initialize(asin, creation_date, upload_state, upload_state_id)
#asin = asin
#creation_date = creation_date
#upload_state = upload_state
#upload_state_id = upload_state_id
end
end
After parsing, the raw text from above will be stored in an object that look like this:
[#<Product:0x00000101006ef8 #asin="B00137RNIQ", #creation_date="2010-04-09 09:33:45 ", #upload_state="Imported ", #upload_state_id="3">]
How can I then interact with the newly created class objects? For example, how might I pull all the creation dates for objects with an upload_state_id of 3? I get the feeling I'm going to have to write class methods, but I'm a bit stuck on where to start.
You would need to store the Product objects in a collection. I'll use an array
product_collection = []
# keep adding parse products into the collection as many as they are
product_collection << parsed_product_obj
#next select the subset where upload_state_ud = 3
state_3_products = product_collection.select{|product| product.upload_state_id == 3}
attr reader is a declarative way of defining properties/attributes on your product class. So you can access each value as obj.attribute like I have done for upload_state_id above.
select selects the elements in the target collection, which meet a specific criteria. Each element is assigned to product, and if the criteria evaluates to true is placed in the output collection.