Odoo ORM Methods | Object Relational Mapping in Odoo15
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ORM(Object Relational Mapping) is a concept or technique which acts as a bridge between your programming language and your database. Object Relational Mapping helps to execute SQL queries without writing them explicitly. Once the ORM is configured in an application, the user can use the OOP concepts like classes and objects to interact with the database. ORM methods are one of its strong features which helps in executing SQL queries without writing them down explicitly. With the help of ORM methods, the user can implement the OOPS concepts to interact with the database. Odoo creates and manages tables for us inside the database. Thus reducing our work of creation of tables using the queries.
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Form View Attributes in Odoo 18 - Odoo SlidesCeline George Odoo is a versatile and powerful open-source business management software, allows users to customize their interfaces for an enhanced user experience. A key element of this customization is the utilization of Form View attributes.
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How to Subscribe Newsletter From Odoo 18 Website
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All the materials around us are made up of elements. These elements can be broadly divided into two major groups:
Metals
Non-Metals
Each group has its own unique physical and chemical properties. Let's understand them one by one.
Physical Properties
1. Appearance
Metals: Shiny (lustrous). Example: gold, silver, copper.
Non-metals: Dull appearance (except iodine, which is shiny).
2. Hardness
Metals: Generally hard. Example: iron.
Non-metals: Usually soft (except diamond, a form of carbon, which is very hard).
3. State
Metals: Mostly solids at room temperature (except mercury, which is a liquid).
Non-metals: Can be solids, liquids, or gases. Example: oxygen (gas), bromine (liquid), sulphur (solid).
4. Malleability
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Non-metals: Not malleable. They break when hammered (brittle).
5. Ductility
Metals: Can be drawn into wires (ductile).
Non-metals: Not ductile.
6. Conductivity
Metals: Good conductors of heat and electricity.
Non-metals: Poor conductors (except graphite, which is a good conductor).
7. Sonorous Nature
Metals: Produce a ringing sound when struck.
Non-metals: Do not produce sound.
Chemical Properties
1. Reaction with Oxygen
Metals react with oxygen to form metal oxides.
These metal oxides are usually basic.
Non-metals react with oxygen to form non-metallic oxides.
These oxides are usually acidic.
2. Reaction with Water
Metals:
Some react vigorously (e.g., sodium).
Some react slowly (e.g., iron).
Some do not react at all (e.g., gold, silver).
Non-metals: Generally do not react with water.
3. Reaction with Acids
Metals react with acids to produce salt and hydrogen gas.
Non-metals: Do not react with acids.
4. Reaction with Bases
Some non-metals react with bases to form salts, but this is rare.
Metals generally do not react with bases directly (except amphoteric metals like aluminum and zinc).
Displacement Reaction
More reactive metals can displace less reactive metals from their salt solutions.
Uses of Metals
Iron: Making machines, tools, and buildings.
Aluminum: Used in aircraft, utensils.
Copper: Electrical wires.
Gold and Silver: Jewelry.
Zinc: Coating iron to prevent rusting (galvanization).
Uses of Non-Metals
Oxygen: Breathing.
Nitrogen: Fertilizers.
Chlorine: Water purification.
Carbon: Fuel (coal), steel-making (coke).
Iodine: Medicines.
Alloys
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Odoo ORM Methods | Object Relational Mapping in Odoo15
- 2. INTRODUCTION ❖ ORM(Object Relational Mapping) is a concept or technique which acts as a bridge between your programming language and your database. ❖ The Object Relational Mapping helps to execute SQL queries without writing them explicitly. ❖ Once the ORM is configured in an application, the user can use the OOP concepts like classes and objects to interact with the database. ❖ ORM methods are one of its strong features which helps in executing SQL queries without writing them down explicitly. With the help of ORM methods, the user can implement the OOPS concepts to interact with the database. ❖ Odoo creates and manages tables for us inside the database. Thus reducing our work of creation of tables using the queries.
- 3. ❖ sorted ( ) ○ The sorted() method returns the records inside the self, ordered by the key passed as the argument. ○ Syntax: Model.sorted(key=None, reverse=False), If reverse is set as True, returns the result in reverse order. ○ Eg: records.sorted(key=lambda r: r.name) - Sorts the record based on the name field.
- 4. ❖ mapped ( ) ○ The mapped() function applies the function given as an argument on all the records in the self, and then returns the result as a list or recordset. This method accepts a function as its argument. ○ Syntax: Model.mapped(func) ? recordset / list ○ Eg: records.mapped(lambda r: r.field1 + r.field2) - This returns a list of summing two fields for each record in the set.
- 5. ❖ filtered ( ) ○ The filtered method returns a set of records which satisfies the function given as argument. This method accepts a function as its argument. ○ Syntax: Model.filtered(func) ? records ○ Eg: records.filtered(lambda r: r.company_id == user.company_id) - This only keeps records whose company is the current user's.
- 6. For More Details Check our company website for related blogs and Odoo book. Common ORM Methods ORM (Object Relational Mapping) in Odoo Check our YouTube channel for functional and technical videos in Odoo. Odoo ORM Methods
- 8. Thank You