# Create and Update API

## makeClassFromData

**Variation-1**: Builds a class object from given name, primary key and the data.​ The class is generated from the data. This is equivalent to generating a class from the data.

```

MetaApi.makeClassFromData (className, pkAttrName, data)
```

**Parameters**

```
className:   name of the class object (string)
pkAttrName:  which attribute is the primary key (string)
data:        the data hashmap (dictionary)
```

**Returns**

```
A dictionary representation of newly created class 
```

**Variation-2**: Builds a class object from chosen name, table-name, primary key and attributes.​ This will give you the option to specify the table name different from the class name.

```
Object makeClassFromData(className, tableName, pkAttrName, data)
```

**Parameters**

```
className:   name of the class object (string)
tableName:   name of the table in the database (string)
pkAttrName:  which attribute is the primary key (string)
data:        the data hashmap (dictionary)
```

**Variation-3**: Builds a class object from chosen name, primary key, data and data Types. ​ 

```
makeClassFromData(className, pkAttrName, data, attrTypeByNames)
```

**Parameters**

```
className:   name of the class object (string)
tableName:   name of the table in the database (string)
pkAttrName:  which attribute is the primary key (string)
data:        data hashmap (dictionary)
attrTypeByNames: columns types and names (dictionary)

```

**Variation-4**: Builds a class object from chosen name, primary key, data and data Types and either create a DB table or just keep in memory. When you pass the data it is the stored only in memory when the skipping is enabled. When it is stored in the database it becomes much more restrictive but where as in the memory it is flexible. You can save this class after modifications and it will not be rejected. 

```
makeClassFromData(className, pkAttrName, data, attrTypeByNames), skipSaving
```

**Parameters**

```
className:   name of the class object (string)
pkAttrName:  which attribute is the primary key (string)
data:        data hashmap (dictionary)
attrTypeByNames: columns types and names (dictionary)
skipSaving: true create the table only in memory (bool)
```

## createMetadata

create metadata

```
MetaApi.createMetadata(md)
```

**Parameters**

```
md (dictionary)
```

**Returns**

```
Response from the server.
```

## saveMetadata

save metadata

```
MetaApi.saveMetadata(md)
```

**Parameters**

```
md (dictionary)
```

**Returns**

```
Response from the server.
```

## getAppDataDir

Locate and get the application data directory 

```
MetaApi.getAppDataDir()
```

**Parameters**

```
no parameters.
```

**Returns**

```
The application data directory.
```

## saveClass

Save class details.

```
MetaApi.saveClass(className, clsM)
```

**Parameters**

```
className (string)
clsM (ClassM)
```

**Returns**

```
Response from the server.
```

## updateClassVisibility

update Class Visibility

```
MetaApi.updateClassVisibility(className, visibility)
```

**Parameters**

```
className (string)
visibility (string)
```

**Returns**

```
Response from the server.
```

## createFunctionSysTask

Create a function system task.

```
MetaApi.createFunctionSysTask(mdId)
or 
MetaApi.createFunctionSysTask(orgName, name)
```

**Parameters**

```
mdId (string)
orgName (string)
name (string)
```

**Returns**

```
Response from the server.
```